Install sphinx from wheels
Add linux markupsafe
Small doc changes
Scratch work for ES
Add working top-level search.
Always use a virtualenv when building docs.
Merge branch 'wheel-virtualenv' into staging

Conflicts:
	readthedocs/projects/tasks.py
Replace search url
Don’t special case python 3
Keep virtualenv in the form for now
Kill elastic elastic search dsl for now.
Mount Elastic Search beside old search for now.
Index commits for pages and sections
Index commits for pages and sections
Merge branch 'elastic-upgrades' into staging
Clean up indexing.
Add first step at deleting old pages based on commits
whitespace cleanup
Merge branch 'staging'