Fixes a bunch of grammatical errors, and some warnings

src/main/java/com/massivecraft/factions/adapter/BoardAdapter.java

@@ -25,7 +25,6 @@ public class BoardAdapter implements JsonDeserializer<Board>, JsonSerializer<Boa
     // OVERRIDE
     // -------------------------------------------- //
 
-    @SuppressWarnings("unchecked")
     @Override
     public Board deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
         return new Board(context.deserialize(json, Board.MAP_TYPE));