ENH: Better text SDF calculation
FIX: Fix tests on windows, remove dep for tests
Merge pull request #357 from Eric89GXL/read-png

FIX: Fix tests on windows, remove dep for tests
FIX: Fix examples
Merge pull request #349 from Eric89GXL/fix-exs

FIX: Fix and reorganize examples
Merge pull request #366 from Eric89GXL/better-sdf

ENH: Better text SDF calculation
Make compiler avoid reserved GLSL names and any variables declared in function code
visual examples appear to be working
flakify
Added faster compiling method
Avoid function arguments in name mangling
Avoid excessive name length
Added MainFunction class
Small fix and make ModularProgram use MainFunction
flakify
Imitial import of glagg line visual from Rossant and Rougier.
Renamed LineAggVisual to LineAgg
Add line_agg examples
line_agg visual is working
Updates to scene/line_agg example