* Allow mesh-based windows (with non-solid shape) to pass through
* Allow precast elements to be clones
* Structure elements now display a different icon when thry are clones
* Arch clones now get the same placements as their cloned object on create
* Fixed the bad export of clones to IFC
* Recoded the Site/Building/Floor IFC export to be more flexible
* If an arch object is selected when creating a window, the window is always inserted in that object
* No more "create from scratch" mode.
* Now needs to create the sketch first, then press the window button
* Added "Auto-include" checkbox in window creation task, to disable auto-embedding
* Fixed wrong orientation of windows
Arch objects can now be based on a Part Compound and will take
its DiffuseColor property. Arch objects that are clones of
such objects will also copy that property.
* Added utility to make non-parametric Arch component
* Ability for all Arch components to be a clone of another Arch component of same type
* Modified the Draft Clone tool to produce Arch Clones if applicable
* Fixed Arch Roofs so they can be based on a solid shape like other Arch objects
* Ability to change the Root element to be imported in IFC preferences
* Ability to import IFC files also as compounds, Part shapes or non-parametric Arch objects
* Added an "only" parameter to importIFC.open() to import only a certain object ID.
* Ability to read colors (IfcSurfaceStyle) from IFC objects
* Removed roundings in exported objects
* Added toggleIfcBrepFlag command to force export as BREP
* Prepared Arch objects for Materials and custom IFC attributes
* Supported latest developement version of IfcOpenShell
* Cleanup of IFC exporter
* Export of Arch Sites as IfcSite
* Export of Groups as IfcGroup
* Removed redundant code in Arch objects
* Supports wandererfan's Units code in Draft module
* Cleanup of the IFC exporter
* Better support of extruded profiles in IFC export
