Show suggestion on the 404 page
use slug
add tests for helpful 404 page
separate getting suggestion logic from error handler
handle fallbacks in URL dispatcher
remove unused import
Add badge endpoint.
Proxy the image.
Merge branch 'master' into feature/rich404

Conflicts:
	readthedocs/templates/404.html
Move into project namespace.
Clean up build code
Only show finished builds for the badge :)
load core_tag
Replace varnish in arch diagram.
Update translations
Add initial machinery for translating docs
fix doc_url tag to return a valid URL
add tests for doc_url tag
doc_url tag supports singlehtml
Small docs cleanup