BUG: Build BRAINSMultiSTAPLE by default and when AutoWorkUp is selected
ENH: Added Sink and Grabber between Phase I and Atlas
BUG: DataSink will fail if an empty list is passed or an empty list with an empty string or a None object.
     Fixed convertToList() s.t. None objects return '' instead of [None].
TODO: Side effect of fix is that the CACHE directory for the DataSink is copied to the results directory for missing files (i.e. None -> '')
ENH: Added DataGrabber between Phase I and Atlas
ENH: Simplified loop over sessions
ENH: Removed unneccessary nested loop
WIP: BRAINSCutCMD.py had hardcoded python path.  This exposed a BUG in the environment node script creation in baw_exp.py: if a bin/ directory is specified for an executable (like _GRAPHVIZ_BIN_DIR) and a Python executable exists in that directory, then the virtualenv python will be bypassed and the incorrect executable will be called
ENH: Added Sink between Atlas and Phase II
ENH: Added DataGrabber between Atlas and PHASE II
Merge branch 'master' of github.com:BRAINSia/BRAINSTools