* Updated, more flexible binary scenery format.
* Support for using digital axes (i.e. a hat) as a pair of buttons
which can be mapped to any function a button could be mapped to.
+* Added user documentation to the base package
+* Added a c172 mini panel.
+* Improved c172 panel graphics.
+* Added units to configuration files
+* Fixed X15 panel
* External view panning fix ups.
* Fixed the segfault on exit bug.
* Lots of property manager tweaks. Appened units to property name to