Windows WebGL Too many uniforms

Windows appears to be more limited than Mac and Linux on the number of uniforms that can be used. The following post details this

http://bocoup.com/weblog/counting-uniforms-in-webgl/

This issue came up when visualizing an sEEG sensor set with 900 sensors. For the moment, this is just the default dataset, and we should expect real sEEG sensor sets to have more on the order of 100 to 200 sensors.

The MEG sensor set of 276 sensors did not present this error.

It would be nice to work around this error if it becomes a real problem. A solution for the default data set is to use fewer sensors.