Stackoverflow fix (#1742)

* executive tracer builds flat traces without intermediate struct

* temporarilt commented out tests for traces

* fixed new way of building trace address

* fixed new way of building trace address

* updating state tests with flat tracing in progress

* fixed flat tracing tests

* fixed compiling ethcore-rpc with new flat traces

* removed warnings from ethcore module

* remove unused data structures

ethcore/src/externalities.rs

@@ -267,7 +267,7 @@ impl<'a, T, V> Ext for Externalities<'a, T, V> where T: 'a + Tracer, V: 'a + VMT
 			self.state.transfer_balance(&address, refund_address, &balance);
 		}
 
-		self.tracer.trace_suicide(address, balance, refund_address.clone(), self.depth + 1);
+		self.tracer.trace_suicide(address, balance, refund_address.clone());
 		self.substate.suicides.insert(address);
 	}