Close #32: Analysis class now allows easy replication of (tracking) analysis.

TrackingAnalysis' abilities have been augmented considerably. It can now
perform a cross ensemble member analysis, comparing a variety of metrics
for how 'good' a track is, i.e. how well it compares to the best
tracks database. These include a win/lose/draw metric based on whether
one derived track has a lower av dist from the best track than another
(with different tracking configuration). It also includes combined stats
for the sum of the average distance froma derived track to the best
track. All output is logged, and the input data is just good_matches,
which can be performed on the UCL computers concurrently and copied over
to a local machine for processing.