Create test_meshdata.py
add cone and arrow primitive
Update meshdata.py
Create primitive_mesh_viewer_qt.py
Solve pep8 problems
More pythonic names for variables
add sip initialisation
some fix
add correct top file
spell fix ...
inc step with 0.1
supress factor for arrow ...
Update primitive_mesh_viewer_qt.py
Update primitive_mesh_viewer_qt.py
Update primitive_mesh_viewer_qt.py
Update primitive_mesh_viewer_qt.py
Update meshdata.py
Merge pull request #477 from sylm21/master

Meshdata update
Grid.add_widget sets single parent rather than adding parent
Added shadertoy example.
Added interpolation and wrapping keyword arguments to texture creation.