I got a RaspberryPi last week and got this program up and running. It is a very nice program.
I did make a modification so it would display information from my Nest thermostat. I have a separate program reading the Nest every 5 minutes and creates a data file. I then modified part of this program to grab that file and display the data. I have documented it in another thread on this forum. Indoor Temp shown in widget or tempest app tile while connected to Nest