Bug 1033825 - Remove role="button" style selectors.
Bug 979636 - Unit tests for video app, updateSelection
Bug 1029979 - TonePlayer: prevent successive trash/ensureAudio() calls from creating an AudioContext with a null channel r=gsvelto
Bug 906580 - [email][l10n][meta] Support dynamic language changes by setting data-l10n-id and data-l10n-args on all dynamic nodes. r=asuth

With some minor lint/whitespace fixups by asuth as well as a cleanup in
folder_picker.js where it turned out we didn't need to be localizing
what we were localizing since we immediately clobbered it.
Bug 1011016; new marketplace dev/stage packages