Made the Platform abstraction methods used only by Game private.
Merge pull request #726 from seanpaultaylor/next

Made the Platform abstraction methods used only by Game private.
- Fix to Terrain::getVisibleTriangleCount.
- Fix to script camera in gameplay-tests.
- Other minor tweaks to Terrain test.
Merge branch 'next' of https://github.com/blackberry/GamePlay into next
Adding "preferPhysical" parameter to Game::getGamepad().
Using this to simplify the tests that use gamepads.
Fixing some issues related to adding and removing gamepads.
Allowing for multiple virtual gamepads within a game's configuration.
Updating the lua bindings.
Removing USE_XINPUT from project settings.
Merge pull request #728 from ablake/next

Fixing stuff.
Hide Bullet dependency by making PhysicsMotionState private.
Refix due to accidental revert of 9b5424f566.
Updated GamepadTest and PS3 mappings
Merge pull request #730 from seanpaultaylor/next

Updated GamepadTest and PS3 mappings
Merge pull request #729 from kwhatmough/next

Refix an accidental revert, and hide Bullet classes from public API
Update brick and brick normal for LightTest.
Merge pull request #731 from seanpaultaylor/next

Update brick and brick normal for LightTest.
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.
Fixed a compile error in Gamepad
Updated FrameBuffer bind and bindDefault to return the previously bound framebuffer.
Merge branch 'next' of https://github.com/blackberry/GamePlay into next