Add Aptana/PyDev projects to .gitignore
Do some pep8 cleanup
Change registering templatetags using decorators
Refactor the get_content_types templatetag using json.dumps

Use a dictionary and dump it as JSON using Pythons built-in library
instead of building a JSON-string by hand.
Merge pull request #256 from QPmedia/pep8-fix-and-cleanup

Pep8 fix and cleanup
Czech translation for grappelli documentstructure CSS file
Czech TinyMCE translation
Czech translation for TinyMCE grappelli plugins.
Merge pull request #261 from praus/stable/2.4.x

Czech translation based on Stable/2.4.x 
Make setup.py work with Python3, fixed #260