DetailSerializerMixin compatibility with DRF>=3.0
Fix #41
Added fullname and year to licence file
Added MIT license to setup.py
Rename LICENCE to LICENSE
Include auxiliary files in source distribution.
Merge pull request #42 from fladi/source-packaging

Include auxiliary files in source distribution.
Fixed #46 DetailSerializerMixin DRF 3.0 compatibility
Merge branch 'master' of github.com:chibisov/drf-extensions
Merge branch 'master' into add-args-kwargs-bits
#36: if no param names passed to KwargsKeyBit use all kwargs for key
#36: add test case for KwargsKeyBit if no parameters given

Assert that KwargsKeyBit generates key bit using all kwargs.
#36: added documentation to markdown help and Release Notes