Fixing PS3 triggers and button mappings on MacOSX.
Renaming MacOSXGamepad<whatever> classes to HIDGamepad<whatever>.
Making the Gamepad test a bit more verbose but also a bit simpler (only one player at a time) for now.
Merge branch 'next' of https://github.com/blackberry/GamePlay into next
Also moving the triggering of Gamepad disconnect events in Windows to the message pump to avoid deleting a Gamepad that is currently in use.

Conflicts:
	gameplay-tests/src/GamepadTest.cpp
	gameplay-tests/src/GamepadTest.h
	gameplay/src/PlatformMacOSX.mm
Merge pull request #732 from ablake/next

Enables PS3 triggers on MacOSX, moves connection events to message pump in Windows.