Remove small overhead

This is likely not compatable with java 1.6. I do not focus on 1.6 anymore so if you are using java 1.6 for any reason please upgrade.

Remove several comments from the source code (will replace it at a later time)

Change from getDisplayName() to getCommandSenderName() to prevent mixups when it comes to using the NameFormatEvent

Removed ProfileUtils since it is no longer needed.

Added a try/catch so when you are converting names to uuid, it wont cast an NPE when the username isnt a real one.

Removed unused class.