Bug 1011859 - Order gamepad axes properly. r=jimm, a=sledru
Bug 1010747 - Part 1: Cleanups and factor out float32 specialization for unary instructions returning int32. r=jandem, a=sledru
Bug 1010747 - Part 2: Implement Ceil (floating-point) -> int32 in Ion. r=sunfish, r=mjrosenb, a=sledru
Bug 1010747 - Part 3: Factor out floating-point conversion to int32 and bailout code. r=sunfish, a=sledru