Split logger.h into log_reader and log_writer

Much simpler!

Change-Id: I6c4ee363b56b67dac40c456261bbed79d01b8eb6
diff --git a/aos/events/logging/log_cat.cc b/aos/events/logging/log_cat.cc
index 2e23e0a..2032f9f 100644
--- a/aos/events/logging/log_cat.cc
+++ b/aos/events/logging/log_cat.cc
@@ -7,7 +7,7 @@
 #include <vector>
 
 #include "aos/configuration.h"
-#include "aos/events/logging/logger.h"
+#include "aos/events/logging/log_reader.h"
 #include "aos/events/simulated_event_loop.h"
 #include "aos/init.h"
 #include "aos/json_to_flatbuffer.h"