CC-4797: Generate localization locales on install

-check if locale exists before writing it to /etc/locale.gen on Debian
Merge branch 'devel' of dev.sourcefabric.org:airtime into devel
CC-4846: Upgrade meet PHP warning

-fixed
Updating fr_FR .po files
Bumped copyright date to 2013
2.3.0 initial db upgrade script
Merge branch 'devel' into 2.3.x-saas