Fix empty project UI

In an empty project, the 'project is empty' light well was mashed up against the project panel. The light well have 16px margin so there was some white space along the edges that looked funny. This MR makes the 'project is empty' text block a `gray-content-area` which fits nicely with the rest of the UI.

**Current:**

![Screen_Shot_2015-09-14_at_11.20.47_AM](https://gitlab.com/dblessing/gitlab-ce/uploads/07b39641f602e01440dd5558a0d80237/Screen_Shot_2015-09-14_at_11.20.47_AM.png)

**As proposed:**

![Screen_Shot_2015-09-14_at_11.20.29_AM](https://gitlab.com/dblessing/gitlab-ce/uploads/1c3b1d73584c68a88cd1b0fcf3d6ea5b/Screen_Shot_2015-09-14_at_11.20.29_AM.png)

See merge request !1291

Don't display "git clone --bare <URL>" if no URL is available

Make it clear that forking is different than importing. Forked repositories don't use `import_url`, so only display if is available. Introduced in !1231

Before:

![image](https://gitlab.com/stanhu/gitlab-ce/uploads/d8456334a2a9187b56a885f8849f229e/image.png)

After:

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/9823e8a2baf02859c4c3f05f3a5c35bf/image.png)

See merge request !1295

Update gitlab_emoji to 0.1.1

See merge request !1290

Introduced in !1231

Improve UI for last push widget and web editor

See merge request !1296

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

Improve project settings button on profile

Rename `Edit profile settings` to `profile settings` button
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1932

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

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

add "replace" and "upload" functionality

    Refactor upload and replace functionality

    Rename file and move CSS

    Fix typo

    Make dropzone a div

    Remove unnecessary file

    Change color of "upload existing one"

    Add missing changes

Add page titles to header for group and project
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixes https://dev.gitlab.org/gitlab/gitlabhq/issues/2586

See merge request !1293

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>

Make all group public

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1219#

Internal issue - https://dev.gitlab.org/gitlab/gitlabhq/issues/1361

See merge request !1247

Import forked repositories asynchronously to prevent large repositories from timing out

Preserve synchronous mode of adding a repository since some tasks (e.g. restore/check) require the former.

One side bug fix is that the `ProjectCacheWorker` is also run, updating the repository size and commit numbers properly. Previously all the values were set to 0 when a project were forked.

* Closes #2388
* Closes #2400

See merge request !1231

Fix tooltip display in list views

After the recent UI changes the tooltips in a list view rendered behind the next object. This resets the tooltip's container to the body, rather than the individual `issue-info` div. In particular, this change will be applied to *all* tooltips in GitLab. This should take care of any other unidentified issues like this and should not have any negative effects that I can think of. This fixes the bug I noted in !1255.

**Current:**

![Screen_Shot_2015-09-14_at_8.45.34_AM](https://gitlab.com/dblessing/gitlab-ce/uploads/5fc6343f2e440dd10d01dfa595835e6a/Screen_Shot_2015-09-14_at_8.45.34_AM.png)

**As proposed:**

![Screen_Shot_2015-09-14_at_8.44.35_AM](https://gitlab.com/dblessing/gitlab-ce/uploads/7ffce7ce7523514bf7bb43d6380eb1d1/Screen_Shot_2015-09-14_at_8.44.35_AM.png)

See merge request !1288

Keep add-diff-note button the same size on hover. Fixes #2497

Removes the overridden `font-size` and `width` so the button inherits size on hover. See #2497 for screenshots of prior behavior.

See merge request !1285

Add LATEST_TAG variable to automatically fetch the latest tag

Add LATEST_TAG variable to automatically fetch the latest tag

Replaces !1241

See merge request !1287

added note about Issues stored in the database

Because of tweet https://twitter.com/galstar/status/637981324117020672


See merge request !1930

Improve english of error message

See merge request !1284

Clean up overlap between dashboard and explore

- Clean up overlap between dashboard and explore. ... 5d785457
  - Split up SnippetsController into separate dashboard and explore sections.
  - Use consistent page titles, header titles and sidebars between dashboard and explore sections when signed in or not.
- Consistently case `Back to X` links. 260fcd45
- Link to help from signin page bottom. d92696d3
- Make Help accessible for guests. c258e977

cc @dzaporozhets

See merge request !1260