0001184: Support for arc segments in Draft wires

Draft wires can now be based on a sketch with arcs, by using the
Upgrade tool on a sketch.
Arch: First draft of a Space tool
Arch: forgot to update the cmake file...
Fix focus issue with property editor
Merge branch 'master' of ssh://git.code.sf.net/p/free-cad/code
Add distanceToPoint to VectorPy
Arch: Further work on Space object
0000982: Arch Space object

A new Arch Space object that can be created from a solid shape or from
several boundary faces, or a mix of both
Draft: Small interface cleanup
Arch: Wall and Struct tools now set the working plane before drawing
Fix Python exception handling
Merge branch 'master' of ssh://git.code.sf.net/p/free-cad/code
Arch: added spaces to the ifc importer + minor fixes
Merge branch 'master' of git://git.code.sf.net/p/free-cad/code