Heroku changes.
Always use warc archive; remove USE_WARC_ARCHIVE flag.
Fix media/static assets in debug+mirror mode.
Tweak zip file layout for mirrored assets.
Fix tests for mirroring app.
Update celery docs.
Fix imports.
Use Vagrant Cloud to link to vm.
Remove .DS_store somehow added to git.
Fix Travis settings.
Don't print coveralls debug for travis.
Merge branch 'dev.heroku3' of https://github.com/jcushman/perma into jcushman-dev.heroku3
Removed crufty .DS_Store
Merge branch 'develop' of github.com:harvard-lil/perma into develop
Add supporting partners section, revise supporting institutions.
Fix merge conflict.