Split logger.h into log_reader and log_writer

Much simpler!

Change-Id: I6c4ee363b56b67dac40c456261bbed79d01b8eb6
diff --git a/aos/events/logging/logger_main.cc b/aos/events/logging/logger_main.cc
index da84cc9..dd1d8a2 100644
--- a/aos/events/logging/logger_main.cc
+++ b/aos/events/logging/logger_main.cc
@@ -2,7 +2,7 @@
 #include <sys/time.h>
 
 #include "aos/configuration.h"
-#include "aos/events/logging/logger.h"
+#include "aos/events/logging/log_writer.h"
 #include "aos/events/shm_event_loop.h"
 #include "aos/init.h"
 #include "aos/logging/log_namer.h"