Remove html-pipeline-gitlab

Ports the custom emoji filter to the app itself.

See merge request !1781

Make issue preview look like the result

do not send empty message to hipchat

Didn't like relying so much on Regex matches

Removes emoji-centric tests from GFM specs 💥

Convert GFM reference handling to html-pipeline filters

- `Gitlab::Markdown` is now much cleaner
- Better separation of concerns
- Cleaner, less brittle, more maintainable specs for each reference type.
- Label references actually work!

See merge request !1753

add environment variable force to the documentation

Remove entry that was shipped in v7.9.1

See merge request !532

7.10 requires gitlab-shell 2.6.2.

Fixes #1467.

See merge request !552

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

Conflicts:
	app/controllers/import/google_code_controller.rb

Fix some issues with Google Code importer

Thanks, @mrtux, for reporting all of these.

See merge request !551

Update gitlab-grack to 2.0.1 to get unicorn to stop creating zombies.

Addresses #1461 and private issue https://dev.gitlab.org/gitlab/gitlabhq/issues/2253.

This regression was introduced between 7.9 and the 7.10 rcs, so no changelog item for 7.10 proper.

cc @JobV @jacobvosmaer

See merge request !546

upgrade hipchat

Fix "Cannot move project" error message from popping up after a successful transfer

The JavaScript click handlers were never being removed, leading to duplicate requests when attempting to transfer a project to another namespace. The first transfer would succeed but the subsequent ones would fail, leading to the error message saying, "Cannot move project".

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/0c9f61294291514e0c2a48c204b6a1aa/image.png)

I attempted to write a unit test for this, but it was taking me too long to get it right.

Closes #1448 and #1128

See merge request !548

Multiple event handlers were firing, causing multiple form submissions.

Closes #1448 and #1128

Also, tables! (╯°□°）╯︵ ┻━┻)

Prior it would return the project from the current context, which wasn't
the intended behavior.