Support of Py3 without py2to3
Docs: Running tests
Docs: nosetests
Sphinx requirements
Merge pull request #6 from techdragon/master

Improvements to URL's and Tests
Omit redundant files in coverage
Remove blank lines
Embed video settings file
Dynamic loading backends from settings
Add tests for utils.import_by_path
Docs for utils
Move import by path to utils
VideoBackend.is_valid replaced direct using of re_detect
Tests for CustomBackend
Docs: Custom backends
Release 0.4
Change version in Sphinx