Comment 1 for bug 767342

Attached patch (created from bzr diff) does both of the above. The idea is:
 * Languages displayed: look first in a new location for the languagelistdata.gz file. If found, use its contents as the set of languages to display. If not, fall back to ubiquity's file.
 * Language selected: look for another file that specifies the language to set as selected and if found use it, else use normal means