Don't load image instances when using get_media.
Flake8 changes.
[Bug 1062401] Token authentication for API access.

* DRF Token authentication method.
* API endpoint to get tokens from.
* Cron job to clear out old tokens.
* Fixes for other DRF code that doesn't use token auth.
[bug 1035319] Removed /packages and /src in vendor.

Also removed kitsune.path and addsubmodules.sh.
The .gitmodules file was updated to reflect these changes as well.
[bug 1035319] Updated travis and deploy scripts.
[bug 1035319] Added peep and requirements file.
[bug 1035319] Updated docs to swap vendor for peep.
Update docs to include gulp info