Make APIv2 project admin read/write, instead of anonymous read only

The apiv2 should only be used by the admin user during build process, so this
should be safe to turn into admin RW.
Make apiv2 project permission admin rw AND auth read only
Skip projects in the builders too
Add some logging around stable builds
Override machine tagging when syncing from vas
Add Webhook to GitHub if user has an oauth token
Add websupport back to RTD
Default to comments for now
Fix bug with symlink on non-english version, refs #1058

Adds regression test and fixes up translation symlinking logic a little
Minor grammatical fix
Minor correction of word selection: effect -> affect
Minor changes to quickstart guide in README
Merge pull request #1072 from iKevinY/readme-changes

Minor changes to quickstart guide in README
Merge pull request #1070 from pingswept/patch-2

Minor correction of word selection: effect -> affect
Merge pull request #1069 from pingswept/patch-1

Minor grammatical fix
Merge branch 'master' of git+ssh://github.com/rtfd/readthedocs.org into commenting
Install web support versions of packages for now.
Add web support packages as “comments” app
Remove web support code from requirements
Rename web support to comments