Mustaches for event handlers added

From now on you can pass value dynamically to a handler using mustaches.

Example:

>div
  >input
    %value = {{info.message = Type your message here}}
  >button
    @click = sendMsg:{{info.message}}
    .Send!

component.$methods.sendMsg = ({value}) => {
  // Code on sending the message
  console.log(`Message '${value}' sent!`)
}

Once you click that button, your handler will get the latest value from info.message