Implemented support for RELATIONSHIP_ADD and RELATIONSHIP_REMOVE.

Created FriendAdded, FriendRemoved, UserBlocked, UserUnblocked, FriendRequestSent, (FR)Canceled, (FR)Received, and (FR)Ignored events.
Reordered the events checked in ListenerAdapter to make Messages checked first for faster events for Messages.

src/main/java/net/dv8tion/jda/client/events/relationship/FriendAddedEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.Friend;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class FriendAddedEvent extends GenericRelationshipAddEvent
+{
+    public FriendAddedEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public Friend getFriend()
+    {
+        return (Friend) relationship;
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/FriendRemovedEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.Friend;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class FriendRemovedEvent extends GenericRelationshipRemoveEvent
+{
+    public FriendRemovedEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public Friend getFriend()
+    {
+        return (Friend) relationship;
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/FriendRequestCanceledEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.OutgoingFriendRequest;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class FriendRequestCanceledEvent extends GenericRelationshipRemoveEvent
+{
+    public FriendRequestCanceledEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public OutgoingFriendRequest getFriendRequest()
+    {
+        return (OutgoingFriendRequest) relationship;
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/FriendRequestIgnoredEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.IncomingFriendRequest;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class FriendRequestIgnoredEvent extends GenericRelationshipRemoveEvent
+{
+    public FriendRequestIgnoredEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public IncomingFriendRequest getFriendRequest()
+    {
+        return (IncomingFriendRequest) relationship;
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/FriendRequestReceivedEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.IncomingFriendRequest;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class FriendRequestReceivedEvent extends GenericRelationshipAddEvent
+{
+    public FriendRequestReceivedEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public IncomingFriendRequest getFriendRequest()
+    {
+        return (IncomingFriendRequest) relationship;
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/FriendRequestSentEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.OutgoingFriendRequest;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class FriendRequestSentEvent extends GenericRelationshipAddEvent
+{
+    public FriendRequestSentEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public OutgoingFriendRequest getFriendRequest()
+    {
+        return (OutgoingFriendRequest) relationship;
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/GenericRelationshipAddEvent.java

@@ -0,0 +1,28 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public abstract class GenericRelationshipAddEvent extends GenericRelationshipEvent
+{
+    public GenericRelationshipAddEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/GenericRelationshipEvent.java

@@ -0,0 +1,49 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.client.entities.RelationshipType;
+import net.dv8tion.jda.core.JDA;
+import net.dv8tion.jda.core.entities.User;
+import net.dv8tion.jda.core.events.Event;
+
+public abstract class GenericRelationshipEvent extends Event
+{
+    protected final Relationship relationship;
+
+    public GenericRelationshipEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber);
+        this.relationship = relationship;
+    }
+
+    public Relationship getRelationship()
+    {
+        return  relationship;
+    }
+
+    public RelationshipType getRelationshipType()
+    {
+        return relationship.getType();
+    }
+
+    public User getUser()
+    {
+        return relationship.getUser();
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/GenericRelationshipRemoveEvent.java

@@ -0,0 +1,28 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public abstract class GenericRelationshipRemoveEvent extends GenericRelationshipEvent
+{
+    public GenericRelationshipRemoveEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/UserBlockedEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.BlockedUser;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class UserBlockedEvent extends GenericRelationshipAddEvent
+{
+    public UserBlockedEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public BlockedUser getBlockedUser()
+    {
+        return (BlockedUser) getBlockedUser();
+    }
+}

src/main/java/net/dv8tion/jda/client/events/relationship/UserUnblockedEvent.java

@@ -0,0 +1,34 @@
+/*
+ *     Copyright 2015-2016 Austin Keener & Michael Ritter
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dv8tion.jda.client.events.relationship;
+
+import net.dv8tion.jda.client.entities.BlockedUser;
+import net.dv8tion.jda.client.entities.Relationship;
+import net.dv8tion.jda.core.JDA;
+
+public class UserUnblockedEvent extends GenericRelationshipRemoveEvent
+{
+    public UserUnblockedEvent(JDA api, long responseNumber, Relationship relationship)
+    {
+        super(api, responseNumber, relationship);
+    }
+
+    public BlockedUser getPreviouslyBlockedUser()
+    {
+        return (BlockedUser) relationship;
+    }
+}