This commit generalizes the image upload via drag and drop so it supports all files.
It also adds access control for these files.

Make sure Markdown previews always use the same styling as the eventual destination.

Font size, image width and code-block styling weren't accurate between the markdown preview and the issue/wiki/note body.

See merge request !1514

Fix broken access control for note attachments

From https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/332 by Hannes Rosenögger.

See merge request !1528

Highlight bugfix

Fixes:

* snippet rendering bug #2011
* dev fixtures has invalid root user

See merge request !1532

Updated guides for 7.8

Updated guides fro the 7.8 release

Fixes #2009

See merge request !1531

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

This commit moves the note folder from
/public/uploads/note
to
/uploads/note
and changes the uploader accordingly.
Now it's no longer possible to avoid the access control by modifing the url.
The Avatar upload has been refactored to use an own uploader as well
to cleanly seperate the two upload types.

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

Modify the quick help list to add links to the pricing and feature
comparison pages of about.gitlab.com.