Merge pull request #1 from JamesHealey94/master

Formatting and Javadoc. Also fixed incorrect "main" value in plugin.yml
Merge pull request #2 from JamesHealey94/master

Added localisation and updated version to 2.1 also placed roll messages into localisation
Added Worlds and Levels
Added email to @author
Added Experience class.
Added level command.
Added Experience earning
Added Utils for the config.
Added levels, worlds, and users to the config.
Updated Version to 2.2
Added PKR permissions from the config.
Fixed if statement
Fixed getPlayerLevel() method.
Changed plugin to this.
updated to version 2.2.1
Changed "level" to "Lvl"
Added LVL_DEFAULT to getPlayerlevel
Removed PKR values
Changed Experience methods to static.
Some small cleanup.
Changed Lvl and ExpGain config path values.