Update docs/who_uses.rst

Added dbpatterns to who uses
Merge pull request #812 from fatiherikli/patch-1

Added dbpatterns to the Who Uses docs.
Add (failing) test for unicode support in Resource.method_check
Support unicode HTTP method names in Python 2.x (fixes toastdriven/tastypie#935)
Merge pull request #936 from kennknowles/unicode-upper

Support unicode HTTP method names in Python 2.x
Update docs/paginator.rst with a warning and an example solution, to avoid unnecessary and possibly inefficient database queries; closes #973.
Merge pull request #975 from ikatson/paginator-estimated-count

Update docs/paginator.rst, closes #973 (possible inefficient calculation of "total_count")