Made GroupManager a DinnerPerms based resolver
Fix broken Travis CI status image in the README.
Change Travis CI status image to the new version.
Add Stained Glass to usesData HashSet

fixes an issue with held stained glass' damage value always being set to zero (white) when using the item-durability: false option
Update to Forge 1.7.10-10.13.1.1225
Remove NBTTagEnd, it isn't possible to create it