* Some refactors related repository model
* Move more methods out of repository
* Move repository into models/repo
* Fix test
* Fix test
* some improvements
* Remove unnecessary function
* Implementation for calculating language statistics
Impement saving code language statistics to database
Implement rendering langauge stats
Add primary laguage to show in repository list
Implement repository stats indexer queue
Add indexer test
Refactor to use queue module
* Do not timeout for queues