* Added missing methods Parameter.rename(), Parameter.valuate_from_string(), and Parameter.value_as_string()
* Added missing methods DrawingThread.is_linked().
* Added the following missing methods from the class HybridShapeCurveSmooth
* add_frozen_curve_segment()
* add_frozen_point
* get_frozen_curve_segment
* get_frozen_curve_segments_size
* get_frozen_point
* get_frozen_points_size
* remove_all_frozen_curve_segments
* remove_all_frozen_points
* remove_frozen_curve_segment
* remove_frozen_point
* set_maximum_deviation
* set_tangency_threshold