Merge pull request #300 from neuromorphs/remove_prototype

remove prototype code because torchdata removed support for it

Update ci-pipeline.yml

Update communication_channels.rst

bump importRosbag to v1.0.4

Create requirements.txt for Binder

Merge pull request #258 from anindyaghosh/event_downsampling

Event based spatio-temporal downsampling

use numpy struct to unstruct function for timesurface generation

change Timesurface transform parameters and speed it up considerably

update docs notebook with new ToTimesurface transform

update docs gallery script for ToTimesurface