create a pyopencl context shared with vispy... 
try to share objects as well
sharing textures ...
close to working example
working but not yet perfect
Merge branch 'master' of https://github.com/kif/vispy
Started new graph demo. The edges are ugly: need to make them antialiased.
Delete graph.py
Added graph example.
Merge pull request #117 from vispy/graph-example

New graph example.
FIX: Revert OpenCL changes
FIX: Remove openCL from setup.py
Merge pull request #118 from Eric89GXL/opencl-fixes

FIX: Fixes for OpenCL and new example