Update lamina notebook to fix some outdated info.
fixed error in the coordinate of hexagon array
Merge remote-tracking branch 'upstream/master'
Added photoreceptor model
Fixed missing parameter
Fixed typo
Fixed typo in indentation
Fixed typo in indentation
Fixed typo in import
Updated pycuda model to match model_improvements
Updated kernels to latest model + bugfixes
Updated photoreceptor.py to use single timestep
Minor bugfixes
Fixed incorrect type assignment in microvilli
Updated update block names
Merge branch 'pycuda_improvements' of https://github.com/figpope/neurokernel into pycuda_improvements