(i) add PRINT_LEVEL to the command block (0='nothing' to

3='everything'). This allows to tune the Minuit2 output. (ii) added the
possibilty to give the fit range in bins. For details see the docu.

src/musrt0.cpp

@@ -366,6 +366,8 @@ Int_t main(Int_t argc, Char_t *argv[])
     else
       dataHandler = new PRunDataHandler(msrHandler);
 
+    dataHandler->ReadData();
+
     success = dataHandler->IsAllDataAvailable();
     if (!success) {
       cout << endl << ">> musrt0 **ERROR** Couldn't read all data files, will quit ..." << endl;