Make verbose an argument for the fit function

examples/kickscore-basics.rs

@@ -31,7 +31,7 @@ fn main() {
     model.observe(&["Jerry"], &["Tom"], 3.0);
     model.observe(&["Jerry"], &["Tom", "Spike"], 3.5);
 
-    model.fit();
+    model.fit(true);
 
     // We can predict a future outcome...
     let (p_win, _p_los) = model.probabilities(&["Jerry"], &["Tom"], 4.0);