FIX: Add Zenodo to README
Merge pull request #493 from Eric89GXL/zenodo

FIX: Add Zenodo to README
Minor fix in start_shaders example.
Added assert statement to catch wrong shape of array (see issue #503).
Merge branch 'fix-start-shaders' of https://github.com/rossant/vispy
Minor fix: need to convert data to darray before checking its shape.
Adapt example "examples/high-frequency.py" from glumpy to vispy
Fix copyright and main call in high_frequency example
Merge pull request #502 from rossant/fix-start-shaders

Minor fix in start_shaders example
Merge pull request #504 from maxalbert/master

Fix for #503
Fix naming convention in high_frequency example
Fix style and default size in high_frequency example
Merge pull request #506 from gbaty/move_high_frequency_sample_from_glumpy

Adapt example "examples/high-frequency.py" from glumpy to vispy
FIX: Fix travis
Merge pull request #513 from Eric89GXL/fix-trav

FIX: Fix travis
FIX: Minor fixes to text and better warnings for gloo
FIX: Fix decode
Merge pull request #511 from Eric89GXL/minor-fixes

FIX: Minor fixes to text and better warnings for gloo
Use string_types instead of str in isinstance.