Add pkg-config as required dependency for rugged

Add rake task to drop a project's PostReceive jobs

If a user pushes so many branches/tags to a project that Sidekiq
gets clogged, you can use this script to drop _all_ PostReceive
jobs for a given project.

See merge request !1030

Annotate

See merge request !1040

Fork star bug

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/523

See merge request !1039

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

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

Monthly active users -> Active users last 30 days

Clarify what `Monthly active users` means by changing to `Active users last 30 days`.

remove extra cd's to GitLab installation folder

Added AsciiDoc support and changed to singlequotes

[Documentation] more cleanup installation guide formatting

[Documentation] add nginx test

* fix code blocks
* Make capitalization of titles consistent - missed some in
https://github.com/gitlabhq/gitlabhq/pull/7576

Set charset encoding to UTF-8 for snippets

change X-Frame-Options to SAMEORIGIN for nginx SSL config

Add 'unsubscribes' to the paths blacklist

This is to prevent issues with the admin email feature in GitLab EE.

See merge request !1034

Always set satellite origin

See merge request !1036

Import the database as the `git` user

See merge request !762

Cleaner UI for login and signup pages

![Screenshot 2014-08-15 17.51.52](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/fc8bf3c4a4/Screenshot_2014-08-15_17.51.52.png)
![Screenshot 2014-08-15 17.52.39](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/72706f55b0/Screenshot_2014-08-15_17.52.39.png)
![Screenshot 2014-08-15 17.51.33](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/c46f972944/Screenshot_2014-08-15_17.51.33.png)

See merge request !1022

Unify Nginx files to match as closely as possible

clarify which configs should be updated

remove prerelease note from 6.0 to 7.2 guide

needed to allow sidekiq to load on background jobs tab

[Documentation] cleanup installation guide formatting

make configuration comment spacing consistent

[Documentation] GitLab 7.2 requires GitLab shell 1.9.7

* Fix some formatting issues
* Make capitalization of titles consistent
* Update image that shows how to select branch

Fix installation version, we have 7.2 now

Change the branch name of cloning source to 7.2!! This also needs to be cherry picked to 7.2 stable branch

/cc @JobV @jacobvosmaer @marin

ps: unfortunately, there is mo 🤘 gemoji :(

See merge request !174