title: Angular2 Currency Pipe change decimal separator
body: <p>Hello angular friends,</p>
  
  <p>I'm working on an angular2 app (multiple actually). And I live in the Netherlands.</p>
  
  <p>Currently I'm formatting my currency with the following:</p>
  
  <p>{{someIntegerWithCentsToBeDivided / 100 | currency:'EUR':true:'1.0-2'}}</p>
  
  <p>This displays something like 500 to be Eurosign 5 and 501 to be Eurosign 5.01.</p>
  
  <p>Now we dutchies really like comma's the other way around so does anyone know how to change the . to a ,?</p>
  
  <p>Bonus points if someone knows how to show 5,- optionally when there is no cents.
  My thoughts now would be to extend the CurrencyPipe</p>