Acts Track container reading helper algorithm
Purpose of this algorithm is to load Track Container backends and construct ActsTrk and Acts classes used by ACTS algorithmic code.
Followups:
- check surfaces
- cleanup (I consider renaming helper classes)
- symmetrise use of Aux versus interface containers
@wolter - FYI it seems the surfaces conversion is happy with just Acts::GeometryContext - I have simplified the code for it.
Edited by Tomasz Bold