* make commit collection return constructor to reuse CommitCollection
* extend filter model with setters
* add getCommits to filter
* adjust commit list view to work with new filter
* adjust router to work with new filter
* set 'If-Modified-Since' header to commits request
* add getFirstPage/getNextPage methods
* add set she method
* add set header method
* remove unnecessary check if header exist (override if exist)
* add filter-is to link
* use encodeURIComponent to encode part of link
* add filter id to link
* add filter id to link
* use encodeURIComponent to encode parts of link
* fix since setting  in filter
* add temporarily formatter for old filter settings
* add method to get current commit collection from filter
* disable 'If-Modified-Since' header for now
* update to use filterModel as provider for commits
* add filter to render data
* refactor
* fix getFirstPage/getNextPage call in filter
* get rid of app.currentReviewData
* use direct links instead of calling backbone history
* improve regex to find test specs and not specs from 3rd party libs
* fix path test require setup
* fix some tests