Change rotationSet to rotationIsDefaultPose for JointData
Also for translation. Fixed all code to flip boolean value.
Created EntityJointData so that the ModelEntity stuff doesn't need to change.
Previously avatar used SpatiallyNestable scale to keep track of model rendering scale.
It now uses a new member variable _modelScale instead. This is important because the
notion of "Avatar" space does NOT include scale, so this is now reflected correctly in
the SpatiallyNestable class.
Similarly, EntityItems no longer stuff dimensions into the SpatiallyNestable scale
field. a new _dimensions member variable is used instead. The SpatiallyNestable scale
field for entities should always be one.
Parent joints can now have scale if getAbsoluteJointScaleInObjectFrame() returns a non-zero scale.
This is used in the case of the faux SENSOR_TO_WORLD_MATRIX_INDEX joint.
Overlays now ignore the SpatiallyNestable scale, and render using only orientation, position and dimensions.
Added qDebug stream support for Transform class.
If "scale" property is present but "dimensions" are not, the model is NOT scale to fit.
And the scale of the model's natural dimensions will be affected by the scale properties.
If only the "dimensions" property is present, the model will "scale to fit" the dimensions.
If both properties are present, the model still be "scale to fit" but the dimension will be scaled by the scale factor.
For example:
If a model is loaded that is 2cm tall, is loaded with no "dimensions" or "scale" properties.
It will be displayed as 2cm tall.
{"scale": 2}
The above properties will result in a model that is 4cm tall.
{"dimensions": 1}
This will result in a model that is 1cm tall.
{"scale": 2, "dimensions" 2}
Will result in a model that is 2cm tall.
