Improve projects collecting

Refactor code that cause unexpected AR behaviour.

For example this works fine:

    @projects = Project.personal(@user).accessible_to(current_user)
    @groups = @user.groups.accessible_to(current_user) # OK

But

    @projects = Project.all
    @groups = @user.groups.accessible_to(current_user) # PG:Error

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

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

Milestone merged mr list

Part of #1207

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

Milestone merge request dragging

This is part of #1207.

Allows moving milestone between 3 columns: unassigned, assigned,
declined
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Ruby2.1

Fixed #1075

improve no projects screen

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>

* correct odd capitalization pattern in tagline
* remove "click on button" statement as telling a user to click something is not a good web development practice
* add missing period for consistency

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