Changes:
- Re-added item glowing effect
- Added setting 'minecraft-stats-blocks-broken-count' to disable counting custom broken blocks with mc stats
- Custom weapons no longer require armor sets to activate - can be attached to none.
- Custom heads cannot be switched from hotbar with helmets anymore.
- Fixed KEEP_ON_DEATH with ADD_ENCHANT effects
- McMMO's treefeller ability is now fully supported
- Updated EFFECT_STATIC trigger for skulls
- Updated `has enchantment in hand of` condition to support lower-case enchant names
- Updated item formatting to support base64 skins
- Updated damage effects to work with mythicmobs' mobs
- Some internal upgrades / updates and cleanups