updatedt CONTRIBUTING guidelines
using property decorator, #167
code cleanup (pylint), #167
updated contributing
cleanup
removed search-icon and static in Media inner class, #195
tidy imports, fixed #195
additional note about version_generate, fixed #192
initial python3 compatibility, fixed #181
added custom template class (final_attrs), fixed #184
only filter versions if VERSIONS_BASEDIR is not set, fixed #191
reverted previous update
pep8 checks
fixed sorting, fixed #197
updated translations
more pep8 checks
translation updates
minor style changes
test compatibility with django 1.6
changed setup and included grappelli > 2.5