* added /register alias: pgpreg that can be used when there is a conflict with other plugins that use /register
* bumped version to 2.13
corrected version issue
/register message updates
Merge branch 'master' into releases/2.1x
incrementing versions
Refactored permission group handling
 - Game now has .permission_groups & onEnable method appends config.yml groups
 - Permission class has a constructor that takes a list of default groups, however this is not used
 - Moved getPlayerStatusConfig method to PlayGridMC class
 - setPlayer method appends player status group from config.yml
 - removeGroups method only removes PlayGrid groups
support legacy config replacement token