+ Disable downloading coin.tag file if doc package is not installed
Merge branch 'master' of ssh://git.code.sf.net/p/free-cad/code
0000895: Part.BSplineCurve: allow to set degree and mutliplicites when calling constructor.

Adds the functions:
Part.BSplineCurve.buildFromPolesMultsKnots()
Part.BSplineSurface.buildFromPolesMultsKnots()
+ Selection handling of Python view providers
+ Selection handling of Python view providers
0000895: Part.BSplineCurve: allow to set degree and mutliplicites when calling constructor.
0001277: Allow to use RaySegment object in Raytracing projects