Correct line endings

Also ensure every file ends with a new line for consistency

Author: dmulloy2

modules/API/src/main/java/com/comphenix/protocol/AsynchronousManager.java

@@ -152,4 +152,4 @@ public interface AsynchronousManager {
 	 * @return Set of every asynchronous packet listener.
 	 */
 	public abstract Set<PacketListener> getAsyncHandlers();
-}
+}

modules/API/src/main/java/com/comphenix/protocol/PacketType.java

@@ -1082,4 +1082,4 @@ public String toString() {
 		else
 			return clazz.getSimpleName() + "[" + currentId + ", legacy: " + legacyId + "]";
 	}
-}
+}