Further streamlining of ThOr functors using ADL
- use ADL for composites
- use ADL for combinations
- use ADL for track-like
- constrain default ADL implementations (which call member functions) to not be to 'eager'
- move code from .icpp into .h
Also see #223. Closes #274 (closed), #264 (closed)
must be applied in conjunction with LHCb!3379 (merged)
Edited by Gerhard Raven