IntegrateHead script (function AddHead) working in principle. Transform afterwards is not correct
Corrected RigtestHead head bone name
Only integrate rig from Neck onward. Reset head transform position after reparent. TODO: some weird transform stuff still happening in script, but not when integrating rig manually
Fix transform during head parenting

 - Local position and rotation must be reset, as it's converted automatically from world transform when reparenting
Renamed IntegrateHead to HeadHandler, added RemoveHead, made static, extracted test function

 - test function now in HeadHandler_RigTest: H to add, J to remove head in scenes/test/rigtest_xexano
Merge pull request #221 from ChrAfonso/rigtest

Automated attaching of heads (UPDATE: working)