Imported dbg.cc, dbg.h from libtct
Use dbg() library for debug output
Fixed bug in not clearing targets() before return
Added smartassign() to Likelihood
Added YOUNGPENALTY to prevent short-lived tracks from getting assigned to
Increased tests against MAXMOVEMENT by sort(posvar)
Move computation of updated posvar to after leg positions have been updated.
Disabled replay of oldsnap (temporarily)