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