Merge pull request #1147 from sgrenier/next

Next-sgrenier
Fixed issue with font stretching when drawing onto a frame buffer that is a different size than the original window size.
Misc fixes to UI.
Fixed an issue with particle emitters where they would update incorrectly with very high frame rates.
Exposed some missing properties from ParticleEmitter.
Implemented ParticleEmitter cloning.
Modified particles sample to support loading and saving of particle files on Windows.
Non-Windows platforms now simply display a single particle effect (fire).
Future updates will enable editing (loading/saving) on Mac/Linux.
Merge branch 'next' of https://github.com/blackberry/GamePlay into next