0001042: Draft DXF export with projection direction

The DXF exporter now features an option in Draft preferences
to project the selected objects along the current view direction
on export.
Arch: WebGL exporter now has mouse controls
Arch: Simplified webgl exporter
Arch: Better wireframe material for the webgl exporter
0001003: Interactive Arch Structure tool
Included more modules in sphinx docs
Add Draft.ShapeString Gui tool and makeShapeString function