Small Drift chamber code fixes so it won't crash with with SOS data.
As SOS hodoscope doesn't use stofusinginvadc, make it optional.
Make Xcal_fv_test an optional parameter SOS compatibility.
Changes to control files to analyze SOS data.
  general.param - include SOS parameter for most devices
  hcana.param - add sos versions of previous hardwired parameters
  db_run.dat - put in an angle and mometum for SOS
  output.def - include sos detectors in root tree
  hodtest.C - Add SOS spectrometer and some of its detectors
Merge pull request #36 from sawjlab/sostracking

Add SOS analysis to example script