Update languages.py

adding czech translation
Merge pull request #374 from starenka/patch-1

Update languages.py
new release 0.2.19
Updating documentation for languages. refs #377
Document Step.passed and Step.failed
Merge pull request #383 from lorin/doc-step-pass-fail

Document Step.passed and Step.failed
updating docs for greencard stuff...
adding bitdeli badge
Document LETTUCE_USE_TEST_DATABASE
Add Django steps documentation
A built-in create users step
Add tests for the creating user step
Step to load fixtures with loaddata

Code originally by Alexey Kotlyarov <alexey@infoxchange.net.au>
Merge remote-tracking branch 'github/moar-django-steps' into m2m-model-step
Documentation for the M2M model step