Cleaned up a lot of useless code and make the plugin more efficient.

-Condensed classes, now /hearts can do user and player if specified. Much more efficient. This goes for food and saturation too!
-Added setting Potion effects to player! use /potion < optional: player> type duration amplifier
-Permissions are condensed as well. Although this is subject to change*

Since I removed a few classes, and changed up the functionality of the plugin, I have marked this as 2.0.0-alpha.

This version has been tested with no issues discovered. Enjoy!