Making ``Resource._request`` use HTTP accept header when making requests.

This fixes a bug where, despite changing the serialization format, the default
serailization format (on the server side, set by tastypie) would be used since
no "Accept" header was set.

By forcing an Accept header for each request, slumber will guarantee (to the
fullest extent possible, anyhow) that the messages both SENT AND RECEIVED from a
tastypie server come back in the desired format.
Merge pull request #13 from rdegges/dev

Making ``Resource._request`` use HTTP accept header when making requests...
Fix 'auth' kwarg in example.
Added a patch method.
Using the correct status_code for PATCH requests (202).
added a session kwarg to slumber.API
Merge branch 'dev'

Conflicts:
	setup.py
Merge pull request #14 from toffer/doc-auth-fix

In the tutorial, the Url Parameters example has an incorrect kwarg  for authentication.
Support decoded unicode url fragments
Merge branch 'f/unicode'
up version to 0.4.2
support crate.io changelog tab
Update the version
Merge https://github.com/demux/slumber into dev

Conflicts:
	setup.py
add a note about PATCH support
Remove tests from being installed
Merge branch 'master' into dev

Conflicts:
	setup.py
Add stuff to .gitignore
Add tox.ini for tox (http://tox.testrun.org/)
Merge pull request #31 from msabramo/tox

Add support for tox (http://tox.testrun.org/)