Bump gitlab_git

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

* remove commits stats page (will be replaced by graphs)
* remove additions/deletions from graph because of bad performance
* keep graph logic in gitlab

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

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'refactor-graphs' into 'master'

Refactor graphs

This is first step of refactoring graphs. It includes removing all outdated and non-working stuff.

Related to #1590

See merge request !1123
Merge branch 'master' of github.com:gitlabhq/gitlabhq