documentation fixes
fixes #18
minor addition

 - coverall support
 - translation
 - fixes some (u)gettext calls
 - transifex support
add missed .po file
add Makefile
fixes coverall support
add 'pip install coverage' to travis.yml
updates README
added `coverage` and updates `clean` in Makefile
Update admin.rst
Fixed the queryset filters using a proper reduce in the ConcurrencyActionMixin class, the previous code was not working when more than 1 object was selected in the list, also using a .count() on the queryset rather then len() for efficiency as we o not need the qs data, #18
Merge pull request #19 from tdruez/patch-1

Update admin.rst
Merge remote-tracking branch 'origin/pull-requests/20' into develop
fixes #20. thx tdruez
updates travis to django 1.6b1
travis config
bump 0.6b
Merge branch 'release/0.6b' into develop
fixes locale
add missed configuration for CALLBACK handler