issue #167 | Fix aggregators
Add submitted_by field to vendor

when a new vendor is submitted through the public facing site,
the user is attached.
Revise logo

Swapped old carrot logo with new transparent logo in titlebar
Change buttons

Revised button colors and hover states
Color matchup

Swapped out old blue #101c35 with new blue #2a3655 and converted
orange rgb(210,93,7) to #d25d09
Add some test coverage of models.Vendor
Add support for Django 1.5

Add standin SECRET_KEY, update build matrix
Use code coverage tool in CI builds
Cut support for Python 2.6