Add package description to Raft client.

client/src/main/java/net/kuujo/copycat/raft/client/package-info.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2015 the original author or authors.
+ *
+ * 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.
+ */
+
+/**
+ * Provides lightweight, feature complete Raft client.
+ *
+ * @author <a href="http://github.com/kuujo">Jordan Halterman</a>
+ */
+package net.kuujo.copycat.raft.client;