Bug 966311 - Calculate frame size for stereo wave. r=doublec, a=abillings

We were assuming 8-bit WAVE files were mono-only, but this is
not necessarily the case.
Bug 879981 - Make non-removable items fade out and non-draggable and adjust their cursor for Australis. r=mikedeboer, a=gavin
Bug 968891 - [Australis] Disable the button-text fade-out mask during the customization transition. r=Gijs, a=gavin
Bug 967115 - Fix styling of SDK toolbar buttons in Australis. r=jaws, a=gavin
Bug 969661 - Always re-enable Australis character encoding button when it is removed from an area. r=jaws, a=gavin