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/queues/gyro.fbs b/frc971/queues/gyro.fbs
new file mode 100644
index 0000000..8a76678
--- /dev/null
+++ b/frc971/queues/gyro.fbs
@@ -0,0 +1,18 @@
+namespace frc971.sensors;
+
+// Published on "/drivetrain"
+table GyroReading {
+  // Positive is counter-clockwise (Austin says "it's Positive").
+  // Right-hand coordinate system around the Z-axis going up.
+  // The angle is measured in radians.
+  angle:double;
+  // The angular velocity in radians/sec
+  velocity:double;
+}
+
+// Published on "/drivetrain"
+table Uid {
+  uid:uint;
+}
+
+root_type GyroReading;