Change button styles

Styles for buttons are changed to match user expectations.

Fixes #2004

See merge request !1580

Show active users(non-blocked) on admin dashboard

For gitlab/gitlab-ee#248

See merge request !1656

Fix user fixtures for development

See merge request !1657

Conflicts:
	app/controllers/projects/services_controller.rb
	app/models/project_services/emails_on_push_service.rb

Properly handle autosave local storage exceptions.

Addresses https://gitlab.com/gitlab-org/gitlab-ce/issues/1182.

See merge request !1643

Fix width of text in milestone lists and add assignee icon to merge requests.

Before:

![Screen_Shot_2015-03-06_at_13.48.00](https://dev.gitlab.org/gitlab/gitlabhq/uploads/5754638a3ebb79dee1f6c07a6e268035/Screen_Shot_2015-03-06_at_13.48.00.png)

After:

![Screen_Shot_2015-03-06_at_13.48.14](https://dev.gitlab.org/gitlab/gitlabhq/uploads/fe92adf387964efb3d460dfc61ced3b8/Screen_Shot_2015-03-06_at_13.48.14.png)

I've checked with other screen widths as well, and it looks good all the time.

See merge request !1645

Automatically link commit ranges to compare page.

Closes #2103

Implemented as proposed in the last paragraph of the issue:

> We could do something similar to Ruby, where `1..5` means `1,2,3,4,5` and `1...5` means `1,2,3,4`: `..` means inclusive, `...` means exclusive. In our case, `sha1...sha4` would mean `sha2,sha3,sha4` (exclusive with regards to `sha1`) and `sha1..sha4` would mean `sha1^...sha4`, i.e. `sha1,sha2,sha3,sha4` (inclusive to `sha1`).

- `sha1...sha4` now links to `compare/sha1...sha4`
- `sha1..sha4` now links to `compare/sha1^...sha4`.

See merge request !1649

GitLab UI development kit and UI guide help section

Page with UI elements get generated from current css so you can immediately check how your css changes affects common ui elements. Because it requires GitLab runnning I cannot put it to documentation so I just put link to localhost from development section

cc @developers @sabba @sytse

See merge request !1653

Mobile improvements for user page

* hide calendar on small screens
* hide sidebar and show button to toggle it

Fixes #2101

See merge request !1652

Reduce amount of custom css and increase usage of default bootstrap

* Copy variables template file for configuring bootstrap variables
* Move layout and bootstrap to `base/` directory and explicitly set import order
* Apply some styles from flatly theme
* Replace bs-callout with alert
* Refactor gitlab css state colors
* Cleanup css variables
* Remove custom css for panels and navs

See merge request !1651

Fix editor in IE producing errors #1096

IE seems to handle form submission oddly. It gets fired twice - once from javascript and once from the form click, producing 2 identical requests and causing #1096.

Similar issues: http://stackoverflow.com/questions/14373800

Returning false from the click event seems to fix it and shouldn't cause any side-effects.

See merge request !366

use constant-time string compare for internal api authentication

Send notifications and leave system comments when bulk updating issues.

Resolves https://dev.gitlab.org/gitlab/gitlabhq/issues/1885.

See merge request !1646

Condense commits already in target branch when updating merge request source branch.

Resolves https://dev.gitlab.org/gitlab/gitlabhq/issues/2043.

![Screen_Shot_2015-03-06_at_17.17.13](https://dev.gitlab.org/gitlab/gitlabhq/uploads/8d03540b7b7294ce07005e6f3db6ed3d/Screen_Shot_2015-03-06_at_17.17.13.png)

(Not shown in screenshot, but works fine with rebases as well)

See merge request !1648

 Add tag push notifications to HipChat and Slack messages and normalize output of messages to be consistent

Add tag_push event notification to HipChat and Slack services.

For each service, normalize message output to use:
- User name instead of username
- Include first line of title in message description
- Link to "Issue #X" instead of "#X"

See merge request !370