Fixes broken LightingSample in sample-browser.
Merge pull request #1177 from seanpaultaylor/next

Fixes broken LightingSample in sample-browser.
Updated encoder for libpng changes.
Merge pull request #1178 from seanpaultaylor/next

Updated encoder for libpng changes.
Updated encoder for libpng changes.
Merge branch 'next' of https://github.com/seanpaultaylor/GamePlay into next
Merge pull request #1179 from seanpaultaylor/next

Next
Update README.md
Merge branch 'next' of https://github.com/blackberry/GamePlay into next