change #include "log.h" to <helper/log.h>

Changes from the flat namespace to heirarchical one.  Instead of writing:

	#include "log.h"

the following form should be used.

	#include <helper/log.h>

The exception is from .c files in the same directory.

src/target/target_request.c

@@ -32,7 +32,7 @@
 #include "target_type.h"
 #include <helper/binarybuffer.h>
 #include "trace.h"
-#include "log.h"
+#include <helper/log.h>
 
 
 static int charmsg_mode = 0;