Api branch deletion

Fixes #1127

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

Merge marshal

Remove features raketask

As discussed

Fixes #1179

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

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

Implements drag and drop upload of image in every markdown-area

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

New rules for protected branches

This MR change permissions logic for branch removal. Changes listed below:

Before
* developer can remove branch with terminal but not in UI
* masters can remove any branch with UI even protected one
* force-push to protected branch is not allowed but remove is allowed

After
* none can force push or remove protected branches
* developers and masters can remove normal branches with console and UI

Fix js error when use scroll to highlighted line

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

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

Fix avatar URLs in JS-lists for relative_url_root

Update message on the group dashboard page

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

Improved edit file ui

* remove ugly borders
* replace small buttons with tabs
* add spinner while diff is loading

Ability to upload avatar when create new group

Before this change you dont know you can upload avatar for group until you visit group edit page.

After this change you are able to upload avatar during group creation

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>

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>

Grammar fixes

fixed typos in groups messages

Dev setup on metal