Add basic mkdocs override code.
Normalize docroot in GitHub URL
Edit test docs to reflect using ./runtests.sh
Edit typo
Clean up build email fixes. 

Send the notifications from the web celeries for now.
Clean up tasks.py a bit
Autogen mkdocs overrides
Merge pull request #967 from katharinechen/test_documentation

Edit test docs to reflect using ./runtests.sh
Merge branch 'staging'
Don’t always assume a commit will be there
Keep facets in order
Small style cleanup
Properly filter facets based on selected facets.
Handle filtering across all filters properly, attempt 3.
Handle deleted projects and versions in index
Handle the None case down river too
filter by language properly.
Actually filter :)
Fix URL link in project results.
Filter latest build properly by finished state.