MNT: Major refactor.  Moved all modules out of userpackages

- All modules were moved to vttools.vtmods
- All module import is done through the modules.yaml file in
  the NSLS-II folder inside userpackages
- All module autowrapping is done through the modules.yaml file
  in the NSLS-II folder inside userpackages
- This commit gets the hand-built vistrails modules importable
  from within VisTrails
- The next commit (or few commits) will get the autowrapping working