* 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>
Created tests and refactored some code along the way
Added stat graph util spec, refactored code
finsihed up tests and refactors
finsihed up tests and refactors