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
0001046: Draft angular dimensions
Updated links in README
0001057: Bug in Draft Edit
0000729: Arch grouping
Draft: Small fix to Shape2DView
Draft: new method for exporting dxf arcs
0000979: Move windows with their host wall
Draft: Added a Draft Ellipse object
Draft: Preliminary DWG support

Using the teigha file converter. Warning, only working on linux
at the moment. See mantis issue 1103 to help me porting to other OSes
Draft: fixed Draft's cmake file
Draft: dwg support in windows
0000981: Arch groups now have a placement
Merge branch 'master' into drawing