v0.2.5

fixed profile correction (orientation palne)

profile orientation for screw threads etc.

v0.2.3

preparing new version

v0.2.2

extruded profiles can be opened and/or closed

v0.2.1

new extrusion API

v0.2.0

version 0.2.0

Initial release

v0.1.0

warnins and documentation fixed.