Style accept widgets for MR

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Simplify upgrade guide based on 6-4 functionality mentioned by Jacob.
Better cannot-be-merged widget for MR

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge pull request #5982 from jojosch/fix-label-for-sha

Change the Label for SHA1-Seach inside the Network
Merge pull request #5823 from bobot/feature/api_parent_ids

[API] add parent_ids to specific commit informations
Merge pull request #5934 from dblessing/fix/issue_update_js

Fix issue update js
Merge pull request #5799 from criteo/import_url_api

Add import_url param in API projects create
Add note for assignee changes

Change to username per @PixnBits suggestion
Fix links to GitLab cloud
Merge pull request #5937 from RandomInsano/patch-1

Postgres Client Needed for Ubuntu 13.04
Merge pull request #5760 from dermoth/master

Fix HTTP push to public repos
minor language fixes
Add UI for downloading various archive formats.

Change the “Download” button to a split button with options for zip and
tar.gz.
Added download option to tree view.
Merge pull request #5969 from jhollingsworth/feature/zip-archive-ui

Add UI for downloading various archive formats.
Use css truncation instead of rails

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'fix_links_to_gitlab_cloud' of /mnt/ebs/repositories/razer6/gitlab-ce
Merge branch 'hooks_spelling' of /mnt/ebs/repositories/mmoll/gitlab-ce
Dont render README with markup if format is not compatible

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Instructions should create a merge commit and give people a chance to test the branch we are going to merge.
New entries in changelog for 6.5