Speed upgrade

/cc @jacobvosmaer @dzaporozhets

See merge request !1134

Improve backup uploader docs

See merge request !1137

Replace Gitlab::Git::GitStats

Merge branch 'api/issues-filter-milestone' of https://github.com/jubianchi/gitlabhq into jubianchi-api/issues-filter-milestone
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Conflicts:
	CHANGELOG

Fix network graph

Fix #1624

See merge request !1135

Prevent notes polling when there are not notes

See merge request !1132

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

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

Update expected value in notify_spec

Remove def project from tests that inherit it.

The `GitStats` class has been removed from gitlab_git, so parse commits
directly in `Repository#graph_log`.

Replace testme with gitlab-test.

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

Conflicts:
	CHANGELOG

Protect default branch by default

Fixes #1543

See merge request !1130

Keep repositories directory

See merge request !1131

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

Faster branch contains detection for commit

Much faster then iterate over all branches in rugged and look for existing commit

See merge request !1129

Add predictable merge requests on dev seed.

Prevent email sending on admin dev seed.

Only show text wrap and diff notes for text in merge requests.

Add web UI file CRUD tests.

Improve gitflow article

See merge request !195

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