Generating image stacks from EM neurons for MIP search

See example R code in FAFB_to_MIPmask.html

Neuron morphology data available via Virtual Fly Brain: https://fafb.catmaid.virtualflybrain.org/

This script uses the natverse neuroanatomy toolbox: http://natverse.org/

MIP search described in Otsuna et al., 2018 https://www.biorxiv.org/content/10.1101/318006v1

MIP search online tool: https://neuronbridge.janelia.org/