Fix compatibility for old section of github in gitlab.yml

For #243

cc @valery

See merge request !318

Git annex support

- [x] Add authorization for git-annex commands
- [x] Test it manually
- [x] Add CHANGELOG-EE entry
- [x] Add documentation

__Git annex commands allowed only for users who have push access to repository__. We might want to change it in future allowing `git annex get .` for `Reporter` role. It requires understanding which git-annex commands are read-only.

cc @marin @sytse

See merge request !312

Merge CE to EE

See merge request !316

Conflicts:
	doc/install/installation.md
	doc/update/6.x-or-7.x-to-7.8.md

Updated installation and update guides for 7.8-ee

Updated installation and update guides for 7.8-ee

This is not quite complete, it needs a merge from CE into EE after gitlab/gitlabhq!1531 is merged.

See merge request !315

Updated guides for 7.8

Updated guides fro the 7.8 release

Fixes #2009

See merge request !1531

Rebase MR project default value to false

See merge request !314

Merge CE into EE

See merge request !313

Fix duplicate authorized applications

On the profile applications page, display one row per authorized app instead of one row per access token.  See #1987.

cc @sytse

See merge request !1524

Remove top margin for issue/mr title

See merge request !1529

Fix double note submit

Closes #1989.

See merge request !1527

Conflicts:
	README.md
	app/assets/javascripts/project.js.coffee
	app/models/concerns/mentionable.rb
	app/models/project.rb
	app/models/project_services/jira_service.rb
	app/models/service.rb
	app/models/user.rb
	app/services/git_push_service.rb
	config/initializers/1_settings.rb
	config/routes.rb
	db/schema.rb
	doc/integration/README.md
	doc/integration/external-issue-tracker.md
	doc/integration/github.md
	spec/controllers/import/github_controller_spec.rb
	spec/helpers/merge_requests_helper.rb
	spec/lib/gitlab/upgrader_spec.rb
	spec/models/note_spec.rb
	spec/requests/api/groups_spec.rb
	spec/services/git_push_service_spec.rb

Rephrasing in documentation for manual installs

Rephrased the wording in the documentation to say "installation from source" or similar.

/cc @sytse

See merge request !1526

Rephrased wording in the documentation to say "installation from source" instead of  "manual installation" or similar.

Fix typo in changelog

Fixed small typo in changelog file.

Only send "Account was created for you" email when created by admin.

See #1985

cc @sytse

See merge request !1517

Add links to the quick help list

Add links in the quick help list to the pricing and feature comparison pages on about.gitlab.com.  See #1969

cc @sytse

See merge request !1525

Conflicts:
	db/schema.rb

Display the number of unique users with an access token instead of the
total number of access tokens per application in the admin area.

Fix wrong word in document of google oauth