By using a JOIN we can remove the need for using 2 separate queries to
find a project by its namespace. Combined with an index (only needed for
PostgreSQL) this reduces the query time from ~245 ms (~520 ms for the
first call) down to roughly 10 ms (~15 ms for the first call).

On PostgreSQL these queries use LOWER(...) to compare columns and
values. For MySQL a regular WHERE is performed as MySQL is already
case-insensitive.

These two methods remove the need for manually going into
ActiveRecord::Base.connection all over the place.

Clarify Reply by email settings when using Postfix mail server

Fixes #2902.

[ci skip]

See merge request !1528

Update omniauth-* gem dependencies

- twitter to `~> 1.2.0` - closes #2763
- kerberos to `~> 0.3.0` - closes #2792
- google-oauth2 to `~> 0.2.0`
- shibboleth to `~> 1.2.0` - closes #2791

See merge request !1526

Cleanup CI pages

- [x] Remove `ci/projects/:id` page
- [x] Remove Continuous integration from project menu
- [x] Remove unused css/js
- [x] Remove Ci::Commit and Ci::Build controllers
- [x] Move CI services to project settings area


cc @ayufan 

Part of #2594

See merge request !1529

Create project and new merge request page

Create project

![Screen_Shot_2015-10-05_at_21.22.28](https://gitlab.com/gitlab-org/gitlab-ce/uploads/2a3b0118b070f69460f693922bb37300/Screen_Shot_2015-10-05_at_21.22.28.png)

new merge request
![Screen_Shot_2015-10-06_at_21.37.35](https://gitlab.com/gitlab-org/gitlab-ce/uploads/9b7b7ff7a979731a8bf20ceb3e32876b/Screen_Shot_2015-10-06_at_21.37.35.png)

See merge request !1514

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>

Allow removing of project without confirmation when JavaScript is disabled

Also fixes up some CSS errors in the `form`.

Closes #2485

See merge request !1527

Closes #2619

Closes https://github.com/gitlabhq/gitlabhq/issues/9631

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

Closes #2485

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>

Add directory feature button

This MR adds the "Add directory" feature as described in #2557 and splits out the "Create file" and "Upload file" in a dropdown.

### Screenshots

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/098b77026508eef222e0f93ec78f34ec/image.png)

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/93588b0280ffa2bd44603193feac5bdf/image.png)

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/9094a63d41d7cb33e103390545c9c146/image.png)

Added branch capability to upload file form:

![image](https://gitlab.com/gitlab-org/gitlab-ce/uploads/9b3c012a3f2333a5db0e2ceb8e6711ec/image.png)

"Upload file" is no longer accessible from the "Create file" page. Users can now select a target branch in upload file as well.
   
Closes #2799: Fixes a bug where file modes were overwritten after a commit
    
Closes https://github.com/gitlabhq/gitlabhq/issues/8253: Existing files can no longer be overwritten in the "Create file" section.
    
Closes #2557 

See merge request !1453

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>

Change "+" icon under "Files" section to have three options:

* Create file
* Upload file
* New directory

Upload file is no longer accessible from the "Create file" page.
Users can now select a target branch in upload file as well.

Closes #2799: Fixes a bug where file modes were overwritten after a commit

Closes https://github.com/gitlabhq/gitlabhq/issues/8253: Existing files
can no longer be overwritten in the "Create file" section.

Closes #2557

Move CI build page to CE project

* move CI build page to project 
* cleanup unused code
* fix few 500 errors (build cancel and few CI admin pages)
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1524

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>

Render CI statuses on commit page

This MR merges CI commit page into CE commit page.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

See merge request !1519

Fix search in Files

https://gitlab.com/gitlab-org/gitlab-ce/issues/1873

See merge request !1511

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

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