Modular shader fixes
flakify
Merge pull request #315 from lcampagn/shader_fixes

Shader fixes
FIX: Fix commenting
Fix rotation in mesh example.
This is done by disabling transform simplification in ModularVisual;
this should be re-enabled when that system is working again.
flakify
Merge pull request #324 from lcampagn/mesh_example_fix

Fix rotation in mesh example.
Merge pull request #322 from Eric89GXL/minor-tweaks

FIX: Fix commenting
Merge branch 'master' of https://github.com/vispy/vispy into ipynb-vnc