Merge pull request #28 from elasticsales/feature-callablecolumns

Support passing methods to list_display
get_queryset in all backends
Merge pull request #29 from elasticsales/custom-queryset

Allow custom querysets.
Merge pull request #27 from elasticsales/handle-cans

Handle can_delete and can_edit properly
support search in django & mongoengine
fix django
exclude full text search + support sqlalchemy
merge feature-search into closeio