Added device profiles for Amazon Fire TV remote control and game controller

Added device profiles for Amazon's new Fire TV set top box: http://www.amazon.com/Fire-TV-streaming-media-player/dp/B00CX5P8FC

Didn't add support for the media keys since that'd require a plugin. (Working on that, but I believe it's outside of the scope of InControl)

The controller matches the generic android controller mapping except for the different platform/joystick name. Back button wasn't getting picked up, so I switched it to check for KeyCode.Escape.

Remote doesn't have support for all of the standard mapping buttons, but a lot of games on the device support both, and it doesn't work properly without a separate mapping