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: NDmitriy 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: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

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

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

Gitlab flow

This article describes the best practices we use at GitLab B.V.
This is still a draft, please comment and submit improvements.

See merge request !176

Conflicts:
	CONTRIBUTING.md

Faster rev list

Since rugged does not support path filtering yet it affects GitLab performance.
So we use `git rev-list` as temporary but fast and reliable solution for looking last commit of tree

Fixes #1622

See merge request !1127

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