Creates Munin graphs from the data delivered from an attached TEMPer USB Thermometer.
For data collection the `pcsensor` utility is needed (by default it resides in */usr/local/bin/*), it can be obtained in source or binary form from different places like [here](https://github.com/jeroensteenhuis/pcsensor).
If you are querying your TEMPerV1.4 device periodically every 5 minutes (I assume), it disconnects from USB bus every 85 minutes (or every ~17 queries) and is instantly reconnected and detected by the kernel. This script compensates this by a retry after a second after a failed invocation of `pcsensor`.