MNT: Modified behavior of autowrapped function

- will now correctly deal with situations where there are multiple return
  values and when there is only a single return value
MNT: Refactor/moved files from userpackages
ENH: tersified mask creation re: @tacaswell
MNT: Included vttools.vtmods in setup.py
MNT: Missed this file in the initial file transfer commit
Merge pull request #5 from Nikea/tuple_to_dict

MNT: Modified behavior of autowrapped function
ENH: Added function stub for class wrapper
ENH: Removed hard-coded docstring in favor of run-time scraping
Merge pull request #4 from ericdill/moved_from_userpackages

Moved module creation logic from userpackages to vttools