Normal interpolation setting in shader generator

The interpolator can be set in the ShaderGen descriptor now.

See merge request !217

Default property name for halfedge texcoords in meshnode

fix #83

See merge request !216

Fix properties for Solid (colored per vertex, shaded) drawmode

See merge request !215

BSP compile error workaround

Workaround for template argument deduction error in triangle bsp. 
msvc compiles if the default constructors of ref and ray are called.

See merge request !214

Rename mesh tools files

See merge request !213

Moved redistributables into windows library dirs

Removed the windows redistributables and moved them to the library management

See merge request !212

Move tests

Moved the tests directory into the OpenFlipper subdir

See merge request !211

Added ACG grouping to libs_required

See merge request !210

Move math tools

Moved the Math Tools directory into libs_required

See merge request !209

minor documentation fixes, dead build info link

See merge request !207

Moved OpenMesh into libs_required subdirectory

See merge request !208

Moved ACG into subdir

See merge request !206