Added typical signalization channels (CCCH, BCCH, SDCCH) decoder and demapper for BCCH.
The implementation is quite dirty at this moment.
diff --git a/lib/receiver/receiver_impl.h b/lib/receiver/receiver_impl.h
index 42e6d01..200a951 100644
--- a/lib/receiver/receiver_impl.h
+++ b/lib/receiver/receiver_impl.h
@@ -22,9 +22,9 @@
 #define INCLUDED_GSM_RECEIVER_IMPL_H
 
 #include <gsm/receiver.h>
+#include <gsm/gsmtap.h>
 #include <gsm_constants.h>
 #include <receiver_config.h>
-#include <gsmtap.h>
 
 namespace gr {
   namespace gsm {