Security Fixes and Icon Updates

Amongst the usual bug fixes and performance improvements we've fixed an issue where newer devices weren't using the full screen.

Added support for MFi gamepads connected to the remote device (requires Unity 5.4)
Added new touch properties such as 3D Touch and Apple Pencil support (requires Unity 5.4)
Added support for Apple TV devices (requires Unity 5.4)
Added support for compass and location data

Updated UI and design
Other improvements