Refactored Gradle script to plug-in-less (dropped GradleFX integration)
Fixed TravisCI test running
Update to AIR SDK v15
Merge pull request #611 from vpmedia/stage3d-unit-test

Refactored Gradle script to plug-in-less (dropped GradleFX integration)
tests copy application package structure
AssetManager test
change test runner to be able to set visualDisplayRoot