This significantly speeds up post-processing. Some logic is provided to determine which Pi model the script is running on, and number of parallell processes are limited accordingly

option one appends current time to filename. This lets a user use the same command repeatedly without overwriting previous gif files.

Option two lets the user keep new auxiliary files if they want to.

Add script to run arbitrary command or read command from preset file when a gpio pin is read as HIGH. Uses BCM numbering scheme.