fixes #1319
allow Part.makeHelix to use 'vertical height' parm
correct lefthanded conical helixes in TopoShape::makeHelix
Add initial support for different libdir (jobermayr)
+ add '_' as prefix for PartDesign module to fix name clash
Arch: Big cleanup - fixes #1524

* 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
Updated ts files
add inputfield to property editor for PropertyQuantity and PropertyQuantityConstraint
add inputfield to placement in property editor
port the placement dialog to the inputfield
ensure that the placement values are used with every relevant decimal from the property editor
+ workaround to avoid to create invalid code with moc
+ fix whitespaces and a few minor things
+ fix broken connection of signal/slot in placement dialog
fixed a few small typos
+ avoid unncessary calls of setSampleBuffer
Arch: Fixed some bugs in IFC export
Draft: enabled double-click on dimensions
+ path selection on sweep panel
+ allow to always run macros, fix disappearing grid in sketcher
fix inverted sketcher font-size issue and make font size undependend of window size
+ fix crash in SoBrepEdgeSet::renderSelection