Merge pull request #1 from neil-d95/master

Airspeed and Altimeter
Cleanup of HSI
Change airspeed and altimeter to QWidgets
Remove a couple of debugging print statements
Add bounds check function to efis module
Add VSI
Add Turn Coordinator
Add '0' to VSI
Add HorizontalBar Gauge
Fix name text area on Horizontal Bar Gauge

The letters that drop below the baseline were being cut off
Add more qauges to EFIS
Change the roll angle indicator a little bit on the ai
Add signals for turn rate and some of the gauges
Change the names of the Turn Rate properties
Added PFD with Tape for DG, Altimeter, and Airspeed