+ fixes #0001148: Incorrect STL from a mesh
implemented
adding drawstyle icons
adding to menus and toolbars
Merge of tanderson-viewoverride4 branch
+ fixes #0001266: Part Common fails with two surface objects
Merge branch 'master' of ssh://git.code.sf.net/p/free-cad/code
+ Fix regressions by merge of draw style branch
Arch: Added landings to arch stairs
importCSG: add empty compounds for elemets with size 0
Draft: Added a decimals property to Draft Dimensions
Arch: Added blondel ratio to stairs
Draft: Added direction vector to dimensions
+ Approximate curve to B-Spline