Draft: Example of 'binding' tools to conditions and/or event data and/or other tools

Example for using conditions, event data and tools inside the implementation of a tool without 'polluting' the interface with extra arguments which ought to remain implementation details.

• factor out all conditions / event data / tools from MCReconstructible, and move it into a 'bound' tool
• modernize MCTrackGeomCriteria so that (eventually) MCReconstructible will no longer need an initialize function