fix typo in link tag `rel` for manifest (bug 1084548)
Run the validator task as a post request task
Removed Python 2.7 tests to see if it helps Travis.

We're thinking it won't but it's simple enough to try.
Merge pull request #2768 from mstriemer/validator-post-request-task

Run the validator task as a post request task
Allow OPTIONS req to receipt verifier -bug 1108817
Start fetch_manifest task after request completes
Merge pull request #2770 from kumar303/options

Allow OPTIONS req to receipt verifier -bug 1108817
Merge pull request #2771 from mstriemer/fetch-manifest-post-request-task

Start fetch_manifest task after request completes
Remove coverage to test any speed differences
Fixed travis script. Oops.
Bump Django to 1.7
Fix deprecated `get_query_set`
Fix jingo/waffle conflicts
Fix translations app

The `ModelErrorCollection` was removed but there is now an easier way.
Update 3rd party apps
Update nuggets to take REDIS_BACKENDS as a dict
Bump requirements after fixes
Bump Travis to Python 2.7
Fix since outer_if_first went away. OUTER JOINs are now the default.
Bump django-cache-machine requirement