Update slotrefs of equipment correctly
move stuff from util to utils
fixed include pathes
Merge pull request #623 from voxelinc/mv_util_utils

Move stuff from util to utils
merge with master
add EquipmentChanger to remove codeduplication
Renamed WorldObjectSlot to EquipmentSlot
some review suggestions
Merge pull request #620 from voxelinc/slots_fix

Update slotrefs of equipment correctly
merge with master