title: AngularJS - input number spinner, not working correctly when number is inputted manually
body: <p>here on stackoverflow I found a directive made by an user for angularJS, for a input number spinner, and I was just looking for it!</p>
  
  <p>All working good, but one thing is not, when you manually enter a number in the input field, and press MINUS, it s gonna subtract 1 from that number, all good here,</p>
  
  <p>but when you input a number and as first thing you press PLUS, instead of adding 1, it's gonna add a <code>"1"</code> next to the number you wrote!
  Only going "minus" once fixes it,</p>
  
  <p>can someone help me fix the code to avoid this? I want that when I put the number manually, you can press on "plus" and get <code>+1</code> on that number!</p>
  
  <p><a href="http://jsfiddle.net/Legendary/84qxvgm8/" rel="nofollow noreferrer">http://jsfiddle.net/Legendary/84qxvgm8/</a></p>