Allow license to be uploaded and enforce its validity.

Addresses #274.

Still a work in progress, there are no tests yet, some things need extra validation or prettier error messages, and we're not doing anything to enforce active user count yet. Still, the flow stands! Let me know what you think :)

- [x] Check active user count at moment of upload
- [x] Prettier validation / error message when license is invalid
- [x] Prettier error when public key is invalid
- [x] Tests
- [x] Work on copy

These will go into separate MRs as they require more discussion:

- Check historic active user count over past year
- Add application setting to disallow creating/activating new user when limit is reached

-----

No license:

![no_license](https://dev.gitlab.org/gitlab/gitlab-ee/uploads/41168c7141b3c121f2d3137b8566f467/no_license.png)

Also shown when pushing code:

![no_license_shell](https://dev.gitlab.org/gitlab/gitlab-ee/uploads/bc11926a59b266d28ffd61b3de48d54b/no_license_shell.png)

The "Upload a new license in the admin area" part is only for admins, regular users will see "Ask an admin to upload a new license".

Upload page in admin area:

![upload_license](https://dev.gitlab.org/gitlab/gitlab-ee/uploads/44d28581dd0629e67fb014a817ca5675/upload_license.png)

License details in admin area:

![license](https://dev.gitlab.org/gitlab/gitlab-ee/uploads/8836f2b6e0bf8db28673d758eb57338b/license.png)

Notice of a license that will expire: Also notice the license history at the bottom.

![license_will_expire](https://dev.gitlab.org/gitlab/gitlab-ee/uploads/5396b6b3e46f5bb53d5ce33cf5bd23ea/license_will_expire.png)

Notice of an expired license:

![license_expired](https://dev.gitlab.org/gitlab/gitlab-ee/uploads/d4b582a212738054f52ed1909e45568d/license_expired.png)

cc @dzaporozhets @sytse

See merge request !383

This reverts commit 76383e9f.

add 7.10.2-ee pkgs

See merge request !389

CE to EE

See merge request !387

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

Conflicts:
	db/schema.rb

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

Skip git hooks commit validation when pushing new tag.

Addresses gitlab/gitlabhq#2190.

See merge request !386

Fix a trailing new line

The "How to Merge" modal included a trailing new line in the code
block. This commit removes that disfigurement.

Fix missing button types

Improve project home page usability

I looked at project page and saw next problems with it:

* a lot of information but not separated on blocks - hard to understand
* unclear how to contribute to project

Instead of complete redesign I followed step-by-step changes.

### Step 1

First of all I separated Repository and Contribution blocks.
Contribution block should makes it easy for people to contribute. Even when we visit GitHub project page its not clear how to start. Our Contribution section should help with it. All repository stats and download button moved to Repository block.

![Screenshot_2015-05-05_11.49.16](https://gitlab.com/gitlab-org/gitlab-ce/uploads/e69977603acfdc381acb539b19e8cba1/Screenshot_2015-05-05_11.49.16.png)

### Step 2

Next step was to make top section less loaded. I moved clone panel to sidebar because it is very heavy element and rarely used. If you use web editor - you dont even use it. If you work via http/ssh you will copy remote only once. So my idea - it should be on home page but should not be in center of attention.

![Screenshot_2015-05-05_12.47.04](https://gitlab.com/gitlab-org/gitlab-ce/uploads/41633cc8915bb12c979230567b40aea4/Screenshot_2015-05-05_12.47.04.png)

See merge request !610

Use the configured display name in e-mails from Devise mailer

By default, it is set to "GitLab", but a user may configure the display name to something else.

See merge request !613

Improve help line for restricted domain signups

The setting may be misconstrued as only allowing access from certain domains. Add help to clarify this applies to e-mail domains.

See merge request !612

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>

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>

Fix CI links on MR page

Fixes gitlab-org/gitlab-ci#145

See merge request !609

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

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