Added new 'standard' profile
Merge pull request #620 from vpmedia/feature-standard-profi

Added new 'standard' profile into 'auto' profile detection
persistent render textures no longer require an additional buffer texture

Works with Flash Player/AIR 15 and above; the old behaviour can be restored by enabling 'RenderTexture.forceDoubleBuffering'. Find more information about this change here:

http://blogs.adobe.com/flashplayer/2014/09/relaxing-render-target-clear-operation-in-stage3d.html
removed obsolete comment
Fixed ASDoc validation error
Merge pull request #623 from vpmedia/feature-asdoc-fixes

Fixed ASDoc validation error
now supporting nested filters if runtime supports it; added 'SystemUtil.supportsRelaxedTargetClearRequirement'
Fixed Gradle building on Windows
Merge pull request #624 from vpmedia/feautre-gradle-unittest-fix

Fixed Gradle building on Windows
Merge remote-tracking branch 'upstream/master'