Updated .gitignore
Tons of changes, most of which involve creating the SubContour and CellNetwork classes and moving all subcontour-based code to either SubContourTools.py (new stuff) or OldSubContourTools.py (old stuff based on the ever-akward cVLS)
Rearranged code to split subcontour-based function off into separate files (OldSubContourTools.py) for old cVLS-based code and SubContourTools.py for new SubContour-based code
Deleted all old functions from SubContourTools.py (they were all already in OldSubContourTools.py)
Added a ton of changes to SubContourTools.py including adding the new CellNetwork class; even added a few methods to the deprecated OldSubContourTools (before it got deprecated) and did some code cleanup stuff in SWHelpers.py
Merge branch 'subcontour'