+ fixes #0001797: Fix focus problem with Quarter based viewer
+ make sure to set unique labels for newly created documents
+ fixes #0001806: Wrong object name shown in App::PropertyLink Properties in the property editor
+ fixes #0001665: Allow setting higher value for number of backup files
+ split STEP and IGES settings into separate pages, handle Brep mode of IGES format
+ header for IGES files (disabled)
+ customize IGES header
Fix building FreeCAD with PCL

PCLConfig also calls find_package for boost, but with different
components
+ customize STEP header
+ change between AP203 and AP214 schemes
+ fixes #0001798: Support general ellipsoid with three radii
+ expose function to Python to check for invalid mesh points
Arch: Provisorily implemented workaround for utf8 paths and ifcopenshell - issue #1795
Fix #1787 Draft.PathArray align

Correct handling of Euler angle calculations.
+ improve error handling in plane fit
+ add new render type to 3d viewer
+ better exception handling in Part module
+ fixes #0001816: parseQuantity returns garbage
+ improve plane fit
+ fix various rendering problems