add server.get_player

Can't test too closely due to lack of test subjects will similar names.

src/main/java/net/aufdemrand/denizen/tags/core/UtilTags.java

@@ -191,6 +191,35 @@ public void serverTags(ReplaceableTagEvent event) {
             return;
         }
 
+        // <--[tag]
+        // @attribute <server.get_player[<name>]>
+        // @returns dPlayer
+        // @description
+        // Returns the online player that best matches the input name.
+        // (EG, in a group of 'bo', 'bob', and 'bobby'... input 'bob' returns p@bob,
+        // input 'bobb' returns p@bobby, and input 'b' returns p@bo.)
+        // -->
+        if (attribute.startsWith("get_player") && attribute.hasContext(1)) {
+            Player matchPlayer = null;
+            String matchInput = attribute.getContext(1).toLowerCase();
+            for (Player player: Bukkit.getOnlinePlayers()) {
+                if (player.getName().toLowerCase().equals(matchInput)) {
+                    matchPlayer = player;
+                    break;
+                }
+                else if (player.getName().contains(matchInput) && matchPlayer == null) {
+                    matchPlayer = player;
+                }
+            }
+            if (matchPlayer == null) {
+                event.setReplaced("null");
+            }
+            else {
+                event.setReplaced(new dPlayer(matchPlayer).getAttribute(attribute.fulfill(1)));
+            }
+            return;
+        }
+
         // <--[tag]
         // @attribute <server.list_npcs>
         // @returns dList(dNPC)