* Remove Arch option to snap to wall base (reimplemented below)
* Added new Specials snap button
* Special snap snaps to wall baselines, structure basepoints, and contents of SnapPoints property, if existing
* 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
The purpose of this tool is to handle standalone objects such as
furniture or sanitary equipment in a building. It is mesh-based,
and accepts either a mesh or a part shape as its base object.
