Work in progress: Bundle KA strings to language pack

Bundle KA strings into KA Lite language packs. This adds more into the i18n pool that django can pull from, leading to more translated strings. This also includes:

1. More options (`--no-srts, --no_ka, --zip_file, --ka_zip_file`)
2. Bugfixes (mostly related to running `-l all`)
3. A bit of changing around and refactoring stuff

Limitations:
1. Does not update language pack metadata. Still shows the % translated and subtitle count of lean language pack.
2. Some compile errors during the `compilemessages` phase. Must fix.

The code is also quite dirtier than I would like, but eh. It's for a demo :D


![2013-12-02-221717_1366x768_scrot](https://f.cloud.github.com/assets/191955/1661481/e8b79204-5be2-11e3-89ad-7e7976d24715.png)