Playing with pcl library
Move pcl stuff to Reen module
Draft: diverted current dxfLibrary download folder
More detailed error message when xerces fails to read in parameters
+ Replace InputField with QuantitySpinBox
Draft: DXF lib is now pulled from its specific branch
Revert "remove TKAdvTools"

This reverts commit 6843d6ad5dc875ad0599993ac35c1852d1c97a90.
+ fix author note, fix various crashes, improve mesh selection stuff
Arch: Introduced new IFC importer/exporter

* The new IFC importer uses excusively the newest ifcopenshell.py module
* Renamed old importer to importIFClegacy.py
* Included the now deprecated ifcReader and ifcWriter modules into importIFClegacy
* The new IFC importer falls back on the older one if the ifcopenshell module is not found
Draft: Array objects now have an IntervalAxis property to build helicoidal compounds
Arch: fixed bug in wall extrusions
Arch: removed obsolete IFC preference options
Arch: Added scaling in IFC importer
Removed some debugging stuff that was accidentally pushed earlier
+ fix bug when releasing button after dragging point or curve
+ fix memory leak
fix swedish minus simbol
clean up number scanner in Units
Adding changes
Arch: small bugfixes and optimisations