added option to buzz on prime, with settings

apps/primetimelato/README.md

@@ -4,6 +4,12 @@ A watchface that displays time and its prime factors in the Lato font.
 For example when the time is 21:05, the prime factors are 5,421.
 Displays 'Prime Time!' when the time is a prime number.
 
+There is a settings option added in the Settings App.  If 'Buzz on
+Prime' is ticked then the buzzer will sound when 'Prime Time!' is
+detected.  Note the buzzer is limited to between 8am and 8pm so it
+should not go off when you want to sleep.
+
+
 ![](screenshot.jpg)
 
 Written by: [Hugh Barney](https://github.com/hughbarney)

apps/primetimelato/app.js

@@ -76,6 +76,7 @@ function draw() {
 
   g.setFontLatoSmall();
   g.drawString(primeStr, w/2, 3*h/4);
+
   // Buzz if Prime Time and between 8am and 8pm
   if (settings.buzz_on_prime && primeStr == "Prime Time!" && intTime >= 800 && intTime <= 2000)
       buzzer(2);