Made Quat and Vector immutable
Added AxisAngle data type
Made attributes position, orientation, velocity, rotVelocity, scale atomic

Also removed RotVelocity (used AxisAngle from Math instead)
Also removed MeshResource (was only used in Editing plug-in)
Fixed compilation error with different access levels
Configured Json.NET to allow setting properties with private setters
Disabled warning 649 for MeshResource (it is assigned via KIARA)
Fixed copy and paste error in setting motion values on server side
Merge branch 'atomic_attributes' into develop