tester: changed local instances to member variables

the local run function translator, program unit and recreator instances
were changed to member pointer variables along with the output stream so
that they don't need to be passed around between the tester functions;
also did some minor cleanup

commandline.cpp

@@ -68,16 +68,17 @@ CommandLine::CommandLine(const QStringList &args)
 		return;
 	}
 
-	Tester tester(args);
+	Tester tester(args, cout());
 	if (tester.hasError())
 	{
+		coutClose();  // close stdout
 		cout(stderr) << tester.errorMessage() << endl;
 		m_returnCode = 1;
 		return;
 	}
 	else if (tester.hasOption())
 	{
-		if (tester.run(cout(), this))
+		if (tester.run(this))
 		{
 			m_returnCode = 0;
 		}