projects view now accepts projects with spaces

I have created a project named 'MediaWiki core' and django complained it
could not find any URL to match '/project/MediaWiki%20core'. The
patterns were explicitly preventing spaces (\S), turn that to any
character (.).

Change-Id: Ief240112c8a1c0fe6aedf5ecf8f70d0b1e5714a0
Merge "projects view now accepts projects with spaces"