Add setup for GPIO, refactored pin variables as dictionaries
Add setup for GPIO, refactored pin variables as dictionaries

There might be pins in the future that also need to be setup as outputs,
so it would be prudent to have to only add the pin assignment in one
place (the appropriate dictionary) rather than going through each pin
and function individually.

RootAccessHackerspace/k40-laser-scripts,RootAccessHackerspace/k40-laser-scripts