Renamed Vertex3DConverterHelper to Vertex3DHelper
Renamed Vertex3DConverterHelper to Vertex3DHelper
Removed obsolete Matrix3x3.scala (and some old test code that used it)
Now sending all selected objects
Removed projectionPlaneProperty
More constructors
Added setTranslate
Moved the Vec2D <-> Vec3D conversion out of this class
Fixed the offset2dshape operation