memcached cannot handle spaces in keys

Closes #1210. 

Test and quick fix for #1257

Update Exceptions Documentation

Generate random token directly

Fixed a bug backticks

fix

    you may optionally exclude the ``self.check_object_permissions, and simply return the object from the `get_object_or_404` lookup.

to

    you may optionally exclude the `self.check_object_permissions`, and simply return the object from the `get_object_or_404` lookup.

Fixes typo (Implicit instead of Implict).

Viewsets docs typo

The docstring in the example said "update" instead of "create".

fixed typo (wrong "its")

just little bit modify

Fix doc for custom exception sample

The way to provide a default detail for APIException is to define a `default_detail` attribute on the subclass.

Defining a `detail` attribute without `default_detail` will not work, and will result in empty detail instead.

Import force_bytes on django >= 1.5

Django's encode_multipart was updated in django 1.5 to work internally
with unicode and convert to bytes.

In django >= 1.5 we therefore need to pass the BOUNDARY as unicode. In
django < 1.5 we still need to pass it as bytes.

Remove test_compat

Fix typo in docstring for post_delete hook.

Added docs for bulk views from django-rest-framework-bulk.

Include the djangorestframework-jwt package

always obey X-HTTP-METHOD-OVERRIDE header

required to support old flash/flex clients that need to do everything as
GET requests (apparently to allow for any error handlings)

Encode django QuerySets to lists and not dicts in JSONEncoder