First mock implementation of DeMuon and associated objects
Depends on LHCb!3309 (merged) Lbcom!588 (merged) Rec!2607 (merged) Boole!368 (merged) Allen!704 (merged) Panoramix!112 (merged) Alignment!222 (merged)
Sits on top of !124 (merged)
Goes together with LHCb!3343 (merged), Rec!2655 (merged), Boole!371 (merged), Allen!724 (merged), Alignment!242 (merged)