* Initial implementation for git statistics in Activity tab

* Create top user by commit count endpoint

* Add UI and update src-d/go-git dependency

* Add coloring

* Fix typo

* Move git activity stats data extraction to git module

* Fix message

* Add git code stats test

Signed-off-by: Lauris Bukšis-Haberkorns <lauris@nix.lv>

* Integration test for activity page

* Small code refactoring for acitvity page

* Move activity stats calculation logic to model

* Add Activity page to repository

* Add request data for activity

* Add issue data for activity

* Add user unit right checks

* Add releases to activity

* Log repository unit loading error