restructured file layout

new configuration structure:
  peer_cfg: configuration related to a peer (authenitcation, ...=
  ike_cfg: config to use for IKE setup (proposals)
  child_Cfg: config for CHILD_SA (proposals, traffic selectors)
  a peer_cfg has one ike_cfg and multiple child_cfg's
stroke now uses fixed count of threads

src/charon/sa/authenticators/rsa_authenticator.c

@@ -25,7 +25,6 @@
 
 #include "rsa_authenticator.h"
 
-#include <config/policies/policy.h>
 #include <daemon.h>