KitchenPi: adding a watchdog

Although KitchenPi has been running well for over two and a half years, I do get the occasional blip.

A recent issue caused the system to fall silent.

But this turned into an opportunity to do a couple of simple software modifications.

BirdBoxPiCam2014: updating Time on the RaspberryPi

Ok, so it turned out that using NTP to reset the clock on the Raspberry Pi was not one of my greatest ideas for this project.

NTP is for real computing, where high accuracy is required and small errors need to be slowly tuned out.

My requirements for this bird box project are for a step-change correction each time the system boots up, which may be several times per day. Accuracy is just not important.