Perform translation using Mozilla's built-in localization mechanics

This implements the localization properly using Mozilla's localization mechanics.

A few things to note:

 * The addon type is set to 2 as I've included some UI for switching the language, we'll implement this natively in Komodo 9 so you'll be able to remove this then and set the type to 8
 * Apparently Mozilla does NOT fall back on the default language when a string does not exist, we're going to see if we can implement this ourselves but for now you still need to ensure all the strings match
 * After installing the addon you have to enable the Russian language in Prefs > Appearance > Interface