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: Dmitriy 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: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1892

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

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

dont -> don't

Signed-off-by: Dmitriy 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

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

Properly render plain readme

## Before

![Screenshot_2015-07-09_11.38.16](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ba53ad380060eba368aed4ecc71ff4da/Screenshot_2015-07-09_11.38.16.png)

## After

![Screenshot_2015-07-09_11.37.38](https://gitlab.com/gitlab-org/gitlab-ce/uploads/b154c5464c3f89d3ed7a0e7157ee6c58/Screenshot_2015-07-09_11.37.38.png)

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

See merge request !945

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

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

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

Remove unused `task_[un]check` states from Update services

These were left over from the old Task handling.

See merge request !942

Ensure `@sort` is set by set_filters_params

Closes #1750

See merge request !943

Closes #1750

Now that those pesky task states are gone, these become a lot simpler.

These were left over from the old Task handling.

Filter by issues/merge requests without a milestone

Closes internal https://dev.gitlab.org/gitlab/gitlabhq/issues/2372

See merge request !886

New project home page

## Why?

Because current project page is overloaded with information

## Changes

* move activity to separate tab
* make project show page cleaner by removing redundant information
* render README as main content of project page

cc @sytses @JobV

See merge request !938

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