started adding support for logging matrices and used it
diff --git a/aos/common/logging/matrix_logging.cc b/aos/common/logging/matrix_logging.cc
new file mode 100644
index 0000000..cd30509
--- /dev/null
+++ b/aos/common/logging/matrix_logging.cc
@@ -0,0 +1 @@
+#include "aos/common/logging/matrix_logging.h"