make i18nTestCase a pure mixin class
make test for checking if we have js catalog files available
move uninstalling of a language to i18nTestCase too
call collectstatic once we finish creating the js catalog files for a language
simplify the js catalog test
place js catalog files onto the toplevel static dir
Regression test to detect #2030.
Fix to khan-exercises to get button text changing again on error (#2030)
Merge pull request #2037 from jamalex/2030

Fix to khan-exercises to get button text changing again on error (fixes #2030).
Fix the "unary operator expected" error in setup_linux.sh
Directly check for /etc/init.d before asking whether to start at boot.
place js catalog files into i18n/static dir
Merge pull request #2032 from aronasorman/properly_place_js_catalog_files

Properly place js catalog files