Smaller font and leing height for sidebar elements

Recently we added few more entries to project sidebar navigation making it overflow on laptops

1280x720 resolution now:

![Screenshot_2015-07-10_15.34.52](https://gitlab.com/gitlab-org/gitlab-ce/uploads/19f5c77e5d19cf935a4323a079020f7b/Screenshot_2015-07-10_15.34.52.png)

After this fix:

![Screenshot_2015-07-10_15.34.35](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ca9cdcc2ce9c9b6aabb823ba64a3a30a/Screenshot_2015-07-10_15.34.35.png)

This should help for people who use scaling with retina or owners of MacBook Air laptops

cc @JobV

See merge request !955

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

Make edit/remove label buttons smaller

## Before

![Screenshot_2015-07-10_14.29.46](https://gitlab.com/gitlab-org/gitlab-ce/uploads/bc7a4886997ab194c1213f38f163b269/Screenshot_2015-07-10_14.29.46.png)

## After

![Screenshot_2015-07-10_14.31.09](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ebb386a38e264ca7b50dc08891cb919c/Screenshot_2015-07-10_14.31.09.png)

See merge request !954

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

Forks should not have more permissive visibility levels than the original

https://dev.gitlab.org/gitlab/gitlabhq/issues/2286

See merge request !936

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

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

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

This reverts commit 57ec2832.

Point to ci.gitlab.com badge in README



See merge request !1893

Bump coveralls version, remove explicit rest-client dependency

coveralls got updated, so we don't need the rest-client entry in the Gemfile anymore.

See merge request !951

Minor style fixes

### Reset ul list style types inside notes

Because notes are themselves `ul`s, lists inside of notes started at the wrong depth, so this resets that.

Closes #259

---

### Style all blockquote children, not just p

Makes styling of non-paragraph text, such as lists, inside blockquotes consistent.

Closes #1939

See merge request !949

Revert "api: add 'system', 'upvote', and 'downvote' fields to note queries"

This reverts commit dd4fee5f.

See merge request !950

This reverts commit dd4fee5f.

Closes #259

Closes #1939

Note query information

The 'editable' field is required to be able to distinguish system-created notes from user comments. The 'upvote' and 'downvote' fields are so that endpoints don't need to duplicate GitLab's logic for what an up or downvote is.

See merge request !677

Update docker documentation to use only one docker container

I updated documentation to use only one docker container with manually specified path to the persistent data. The container is named `gitlab` and the image will be put in GitLab organisation: https://registry.hub.docker.com/u/gitlab/gitlab-ce/

- [x] Add VOLUMEs to Dockerfile
- [x] Removed all other Dockerfiles (moved everything from docker/single/ to docker/)
- [x] Create DockerHub repository for GitLab CE
- [x] Reword README to use single image
- [x] Push images (manually) to the repository
- [ ] Push to GitHub
- [ ] Enable Automated Build
- [ ] Integrate tagging and pushing of the image with GitLab CI

@JobV @sytses Please review.

See merge request !909

Cache readme rendering result

Markdown rendering is expensive. Lets cahce result
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !947

Show edit readme from project home page

I added pencil icon which redirect you to edit README page (web editor). In this case people can make changes to README easily without going to Files tab, searching for README and pressing edit button here

cc @job  @darby 
Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1892

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

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

dont -> don't

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

Last push widget

Continue of !938. Screenshots are at https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/938#note_1594727

See merge request !946