Bump datatables to 1.10 to support serverSide processing.

Initial json feed view.
[reports] Use the filter query in datatables feed.
[reports] Change filtering form method to GET, remove unused functions.
[manager] Inherit FormManagementView directly from DetailView, FormView.
[reports] enable advanced filtering.
[reports] Set count on RawQuerySet.
[filter] Improve raw query wrapper.
[filters] Fix crashing order
[filter] Implement order by in smart raw query.
[filter] Fix bug with filtering.
[filter] Hack for filtering by choices list.
Update example settings and requirements
Setup instance folder.
Merged datatables branch