Bug#915591: ITP: qmath3d -- Useful 3dmaths functions from Qt3d v1.0

[Wookey <wookey@wookware.org>]

Package: wnpp
Severity: wishlist
Owner: Wookey <wookey@wookware.org>

* Package name    : qmath3d
  Version         : 1.0
  Upstream Author : Digia/Philip Schuchardt
* URL             : https://github.com/vpicaver/QMath3d
* License         : GPL or LGPL
  Programming Lang: C++
  Description     : Useful 3dmaths functions from Qt3d v1.0

 Qt3d v1.0 is long-dead, but part of it was useful. This
 library collects those math3d functions.
  

This library is used by cavewhere (ITP:836249), but is independent, 
so I've packaged it separately.