Clean up build email fixes. 

Send the notifications from the web celeries for now.
Clean up tasks.py a bit
Always show build bar even when no builds.
Clean up docs and add mkdocs stuff
Add mock in default env
Add pillow wheels
Install pillow into virtualenvs
Only use local packages so we don’t hit pypi
Specify versions to use local packages w/ a pypi fallback.
Don’t link to canonical urls until we fix the UI.
Fix README moving in mkdocs
Fix mkdocs sidebar scrolling for now.
Turn off canonical URL tests.
Make project import view more extendable.
Allow email in profile urls
404 on missing version for footer
Ship elastic search at /search/
Link frontpage correctly
Rename api search
Fix search link on dashboard