Add typical track performance histograms.

Add processor, TrackPerfHistProc, that creates the histograms for common tracking performance studies.

The histograms are divided into the following categories:

• real: Tracks matched to truth particles and truth particles matched to tracks.
• all: All tracks and truth particles.
• unmt: Tracks not matched to a truth particle.

The truth particles must be within tracker acceptance, as determined by:

• generator status == 1
• charge != 0
• does not decay in the tracker
• |λ| < 75°

The track to truth match score is configurable via MatchProb parameter.