Docs fix
Revert "Docs fix"

Totally didn't mean to push this.

This reverts commit a41c5868eb7b64bb7e519d7db28f3c213a1a98d3.
Fix docs typo
Update DRF to 2.3.14.
Fix media url in get_media script.
[Bug 1071659] Upgrade httplib to 0.9.
[bug 1058649] Get contribution numbers from ES instead of redis.
[bug 1058649] Use mysql instead of ES for contribution numbers.

* We think mysql will be faster than ES for this.
Sort requirements.
Fix gradient on questions list page