fixed matrix multiplication issue in matrix interpolator
made SceneShape gl preview respond to scene:visible
Merge pull request #214 from davidsminor/sceneShapeVisibility

made SceneShape gl preview respond to scene:visible
Added screen window modes to CameraController::setResolution.

Prior to this, the horizontal screen window was always preserved, with the vertical being scaled to preserve aspect ratio. The screen window can now optionally be cropped/extended instead.
Merge pull request #215 from johnhaddon/cameraControllerCropping

Added screen window modes to CameraController::setResolution.
Test cases

Applied fix to cubic matrix interpolator, added matrix interpolator c++ tests, added a SceneCache interpolated transform test
Merge pull request #213 from davidsminor/matrixInterpolatorFix

fixed matrix multiplication order issue in matrix interpolator