Convert aos over to flatbuffers

Everything builds, and all the tests pass.  I suspect that some entries
are missing from the config files, but those will be found pretty
quickly on startup.

There is no logging or live introspection of queue messages.

Change-Id: I496ee01ed68f202c7851bed7e8786cee30df29f5
diff --git a/frc971/wpilib/interrupt_edge_counting.cc b/frc971/wpilib/interrupt_edge_counting.cc
index 546e64b..9b63b84 100644
--- a/frc971/wpilib/interrupt_edge_counting.cc
+++ b/frc971/wpilib/interrupt_edge_counting.cc
@@ -2,8 +2,8 @@
 
 #include <chrono>
 
+#include "aos/realtime.h"
 #include "aos/time/time.h"
-#include "aos/init.h"
 
 namespace frc971 {
 namespace wpilib {