Merge pull request #760 from sgrenier/next

Fix to release resources when terrain test exits.
Fixed doxygen warnings on Game.
Updated gameplay-api html for v1.6.0
Merge pull request #761 from seanpaultaylor/next

Fixed doxygen warnings on Game.
Updated CHANGES.md for a few more features added.
Merge pull request #762 from seanpaultaylor/next

Updated CHANGES.md for a few more features added.
Fixed shutdown on Windows and added shutdownInternal on Platform.
Merge pull request #763 from seanpaultaylor/next

Fixed shutdown on Windows and added shutdownInternal on Platform.
Fix intermittent Android crash on startup. Rewind before iterating through properties.
Merge pull request #764 from kwhatmough/next

Fix intermittent Android crash on startup. Rewind before iterating throu...
Cleaned up ParticlesGame sample04
Merge pull request #767 from seanpaultaylor/next

Cleaned up ParticlesGame sample04
Fixed all the memory leaks in LightTest via DebugMem.
Fixed memory leaks in BillboardTest.
Merge pull request #768 from seanpaultaylor/next

Next
Minor cleanup to InputTest and TextureTest.
Merge pull request #769 from seanpaultaylor/next

Minor cleanup to InputTest and TextureTest.
Fixed memory leak in Terrain.
Fixed incorrect default render state setting for depth write.