Update upgrade.rst

Corrected -r option in the Upgrade Requirements section.
Update upgrade.rst

Fixed the --upgrade option in the Upgrade Requirements section.
Merge pull request #35 from gpapaz/patch-1

Update upgrade.rst
Combine editing and adding sigs

Now uses a single view: edit_signature(). The add_signature() view
currently just calls the new version
Use new method for everything

urls have remained constant, reworked using the url paths to always use
the new method though
Remove unused view
Refactor bulk_import to not have to check whether sig is new or not
Force absolute imports
Update fixtures for new model
Merge pull request #36 from joshuablake/refactorSigUpdateUpstream

Refactor sig update
Merge pull request #37 from joshuablake/fixVagrant2

Fix Setup Bugs