Merge branch 'ensure_default_fields' into 'master'

Add values to default fields to prevent 500 error when migrate from MySQL to Postgres
No capital letter for recommended.
Remove the vmi's.
 Merge branch 'no-link-to-centos-guide' into 'master'

No link to centos guide
Fix avatars in the network graph for relative-url setups.
Add patch release document.
EE changelog note.
Fix download link for huge MR diffs

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Add OmniAuth Documentation

Add GitHub OmniAuth docs

Google instructions

Google instructions

Merge master

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Add Google and Twitter docs

Add screenshot

Add screenshot

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Finalize current docs

Finalize current docs

Add existing user information

Add twitter

Add twitter

Add Twitter disclaimer

Add Twitter disclaimer

remove old doc

Remove unnecessary link

Revert omniauth provider format

Add OmniAuth Documentation

Add GitHub OmniAuth docs

Google instructions

Google instructions

Merge master

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Add Google and Twitter docs

Add screenshot

Add screenshot

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Clean things up

Finalize current docs

Finalize current docs

Add existing user information

Add twitter

Add twitter

Add Twitter disclaimer

Add Twitter disclaimer

remove old doc

Remove unnecessary link

Revert omniauth provider format

Use omniauth again

Remove notice

Restore whitespace

Slight changes
Merge pull request #6741 from dblessing/omniauth_docs

Add OmniAuth Documentation
Link to the doc.
add mentions of the different placeholders possible for gravatar urls, mentionning the new %{email}
Expose event and and mergerequest timestamps in API, make code more DRY.
Speed up loading and add pagination to wiki pages page.
Satellite will exist when doing automerge_check.
Say issues are accepted at both gitlab and github.
Merge pull request #6749 from cirosantilli/where-to-contrib

Say on CONTRIBUTING that issues are accepted at both gitlab and github.
Proposal for split testing
Fix emails on push service when a single commit is pushed

This fixes issue #161.
Update slack to fix issues with ruby 1.9.3