Improved performance of parameter deserialization
Added log message for retrievals that happen during immediate mode
Fixed bug where reference center was sometimes null
Fixed elevation model popping during animation rendering, by increasing memory and implementing immediate mode for elevation models
Extracted SunPositionAnimatable to an interface
Reduced minimum near distance to 1m
Added head rotation animatable (for HMD animation, eg oculus rift)
Removed extra comment character
Added ability to animate camera field-of-view
Reduced minimum near distance to 1
Switched field-of-view parameter to hardcoded default value in case view doesn't exist