added RTL and LAND capabilities

aerpaw/impl/controller_impl.h

@@ -18,6 +18,13 @@ int receiveTargetAck(int clientId);
 int waitForReady(int clientId);
 void sendFinished(int clientId);
 
+// RTL and LAND protocol functions
+void sendRTL(int clientId);
+void sendLAND(int clientId);
+int waitForAllRTLComplete(int numClients);
+int waitForAllLANDComplete(int numClients);
+void waitForUserInput();
+
 #ifdef __cplusplus
 }
 #endif