Fix drag and drop image tests

Email hint

After this is merged decline http://feedback.gitlab.com/forums/176466-general/suggestions/5767472-move-actionmailer-sending-method-and-smpt-settings

Test ee

Regression issue

We want to aid communication between the issue tracker team and the release manager with this.

A first example of this issue is https://gitlab.com/gitlab-org/gitlab-ce/issues/294

Add pkgrio to readme

Now that we have instructions on [pkgr.io](https://gitlab.com/gitlab-org/gitlab-recipes/blob/master/install/pkgr/README.md) let's add it to the Readme.

Monthly release doc update

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

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

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

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

Comment UI improvements

* use tabs for preview/write comment form because its better UX
* fix paddings for comment form and unnecessary borders
* remove unused css/js
* cleanup messy comment form html

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

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

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

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

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

Explain setting

Missing items changelog

Branch creation flow

To improve user experience with web editing I did next improvements:

* when create branch via ui - redirect to tree view so you start add/edit files
* when click on branch name - redirect to tree view instead of commits so you can immedialty add/edit files

Move protected branches to Project settings page

Because all settings should be in one place

License to bv

Api branch deletion

Fixes #1127

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