Milestone issues dragging

This is part of #1207.
I will submit this feature with small but finished merge requests.

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>

More performance improvements for large groups

* fetch team members using much less sql queries
* collect mentioned users without iterating over all project users

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>

Performance improve

Fixes #1315.
For group with 500 users it reduce amount of sql queries from 500 to 20.
It reduces page load ~ 3 times or even more. For larger group it will be even more difference

Improve MR tabs UI/UX

![Screenshot 2014-06-04 12.29.19](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/b75785b28f/Screenshot_2014-06-04_12.29.19.png)

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

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

Fix 500 on labels page

Broadcast 3 digit colors

This commit fixes a lot of sql queries to db for for groups and projects
with big amount of members.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Fixing typo in help for public access

Fixing a typo in the help page

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>

Update patch release document

Upgrade to rails 4.1

Update docs to match new markdown style guide 2

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

project: ci_service should only catch ci services

Chrome app

ci_service should return true if a ci service is enabled.  Currently
it's checking for any service being enabled instead of only services in
the ci category.

Same origin header

Fixes #1313

Case insensetive search

Fixes #1258

cc @marc

Ui improvements