Undead Nights - Zombie Horde Nights

All the changes from 1.1.0 -> 1.2.0:

• horde config variant 2 can now have several hordes   Please check: https://github.com/MC-Mods-Pete/UndeadNights/wiki
• support for non-mob entities in hordes (e.g. wither_skulls)
• possibility to pass NBT tags to horde mobs in horde config
• horde zombies can now break blocks (disabled per default), there are 3 block breaking tiers:   1 - glass and dirt   2 - stone etc.   3 - iron bars and doors
• demolition zombies will now throw the TNT
• undeadnights command updated (e.g. enable/disable block breaking, set default horde...)
• permissions for undeadnights command added
• maxlimit for spawncap changed to 2048