Increased particle emitter max update rate from 60 to 120 Hz.
Added more flexible sizing and positioning for UI controls:
- x, y, width and height can now be specified as either absolute or percentage-based values, allowing controls to be positioned and sized relative to their parent Container
- changed autoWidth and autoHeight control properties to an enumeration to support the existing STRETCH functionality (where controls stretch to 100% of their parent container) and a new FIT option. Setting autoWidth or autoHeight to AUTO_SIZE_FIT causes the control to automatically size itself to tightly fit its contents.
Merge branch 'next' of https://github.com/blackberry/GamePlay into next

Conflicts:
	gameplay/src/Form.cpp
	gameplay/src/Theme.cpp
Update lua bindings.
Fixed issue with text test in sample browser.
Merge pull request #1189 from sgrenier/next

Next