EFIS update

While I'm on this business trip to Iceland, I've got some time after work to devote to improving the EFIS software, namely, porting it to gtkmm, so that I can easily hop it over to a linux install, like Xfce. My first attempt was basically a disaster, but then I found Glade.

Glade is a UI designer, it writes out a bit of XML, and then I can load that XML with just a few lines of gtk, display it, and run it. Very similar to the forms builder in C# (or perhaps vice versa)

This jumpstarted the port, and I hope I can chew through this and get the current feature set up and running soon.