User/AirborneCodeReorg

This page summarizes the changes needed to switch from the all "raw makefile in airframe" to the new "xml only aiframes" syntax

First step

• fixed wings users:

Comment out or remove the following lines in the makefile section of your airframe.xml

ap.CFLAGS += -DRADIO_CONTROL
ap.srcs += radio_control.c $(SRC_ARCH)/ppm_hw.c  

Add a new xml section like this:

 <target name="fixed_wings" board="tiny_2.11">
   <subsystem name="radio_control" type="ppm"/>
 </target>