Added popup functionality
Added locale definition files
Use localization in popup and main script
Updated description key in locale. Description translation is currently not possible though.

See https://bugzilla.mozilla.org/show_bug.cgi?id=661083 for details.
Merge branch 'v2' of https://github.com/agdsnwu/trafficplugin-firefox into v2

Conflicts:
	lib/main.js