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/aos/vision/blob/threshold.h b/aos/vision/blob/threshold.h
index 8251b3a..f126b14 100644
--- a/aos/vision/blob/threshold.h
+++ b/aos/vision/blob/threshold.h
@@ -1,6 +1,7 @@
 #ifndef AOS_VISION_BLOB_THRESHOLD_H_
 #define AOS_VISION_BLOB_THRESHOLD_H_
 
+#include <array>
 #include <condition_variable>
 #include <mutex>
 #include <thread>