Merge pull request #701 from ablake/next

New Slider properties for automatically displaying the current value.
Updated gamplay-encoder and gameplay-luagen for MacOSX
Updated gameplay-api for v1.6.0.
Minor fixes to API reference warnings from doxygen.
Merge pull request #702 from seanpaultaylor/next

Updated gameplay-api for v1.6.0
Updated gameplay-encoder and gameplay-luagen binaries for windows.
Merge pull request #703 from seanpaultaylor/next

Updated gameplay-encoder and gameplay-luagen binaries for windows.
Merge pull request #704 from seanpaultaylor/next

Updated gamplay-encoder and gameplay-luagen for MacOSX
Updated gameplay-luagen for Windows.
Merge pull request #705 from seanpaultaylor/next

Updated gameplay-luagen for Windows.
Update gameplay-encoder/README.md
Update gameplay-encoder/README.md
Update CHANGES.md
Update gameplay-newproject.sh
Fixed reading of RAW8 and RAW16 heightmaps to read top-left to bottom-right instead of bottom-right to top-right.
Update CHANGES.md
Merge pull request #706 from sgrenier/next

Fixed reading of RAW8 and RAW16 heightmaps
Updated gameplay-encoder and gameplay-luagen for Linux
Merge pull request #707 from seanpaultaylor/next

Updated gameplay-encoder and gameplay-luagen for Linux
Rework description of contactIndex to better suit all platforms.
Fix input test for handling touch events.