Started GLSL snippet library.
Moved GLSL folder to visuals/glsl.
Added a few antialiasing GLSL snippets from @rougier's Glumpy.
Merge pull request #626 from rossant/glsl-snippets

Started GLSL snippet library
examples: fix mpl_plot.py when run as script

This should close vispy issue #631.
Merge pull request #640 from bnewbold/master

examples: fix mpl_plot.py when run as script
WIP.
Added get_color_dict() function.
LinearGradient now has a default x argument value.
Fix.
Started implementing colormaps.
Implemented colormaps.
Fixes.
Fixes.
Fixes and flakify.
WIP: nearest interpolation.
WIP: interpolation functions in NumPy.
WIP: refactoring.
Added tests for LinearGradient.
Added tests for LinearGradient.