Ensure tasks are running in their own process

[g105b]

This may already be the case, but it's worth double checking and putting in the documentation.

The way the Linux cron system works is that all tasks are run concurrently. This needs to be the case for this project too.

Imagine there are some background scripts that take 20 seconds to run. Put them in on the crontab to run every minute, and they should be completed concurrently within their 20 second execution time... however if they are not run concurrently, more than three scripts will overlap into the next minute, and things will catch fire rather quickly.