remove en-US from SUMO url (bug 825751)
Bump addon-packager (bug 828951)

+ Added MANIFEST.in
add timeout to payment failure error
fix typo with enabling scroll after modal is dismissed (bug 831731)
re-enable dev stats export links (bug 819124)
remove MKT_CUT (bug 825245)
missed one cut
remove cut from test_tasks as well
Added more detail for incentive points (bug 806340)
Updated `update_manifest` cron to follow name changes (bug 828737)

This updates the app name, the app's translations if they are specfied
in the manifest "locales" property, and also the default_locale if it's
a locale we support.