moved typedefs to beginning of files to solve some include problems

splitted authenticator to have a separate implementation for each auth_method_t
using va_copy to clone va_lists, should fix proplems on AMD64
some other cleanups

src/charon/threads/receiver.h

@@ -24,11 +24,10 @@
 #ifndef RECEIVER_H_
 #define RECEIVER_H_
 
-#include <types.h>
-
-
 typedef struct receiver_t receiver_t;
 
+#include <types.h>
+
 /**
  * @brief Receives packets from the socket and adds them to the job queue.
  *