More renaming (I know, I know) :  pipeline.py ==> sndrizpipe.py
Updates to the colfax test function (now in testpipe.py)
  - wall-clock timing
  - tar ball containing 3 epochs of F160W images in 4 visits
  - colfaxtest() function has some placeholder code for using urllib2 to
     collect the flt files, if the CADC web retrieval comes back online