Additional features

[stephan281094]

Hey there,

First of all I'd like to thank you for creating this awesome plugin.
Using this plugin really makes for a great user experience. However, I think Zoomerang lacks some features that would make it even better:

• Zoom in and out cursor

  When hovering over the element you want to apply zoomerang to, it would be nice to see a zoom-in or zoom-out cursor. It will be easier to understand for the user what's going to happen when they click on it. This is also used on Medium.com.

• Scrolling event listener

  When the Zoomerang effect is open and the user scrolls, it would be nice to fire the api.close function. To me this really improves the user experience. This is also used on Medium.com.

  Maybe we can have a new option called closeOnScroll that defaults to true (or false) so developers can choose what they prefer.

I'm not sure if you would like to have these features implemented into Zoomerang, but I do think it would be a great addition to an already amazing plugin.

[yyx990803]

Sounds great, would happily accept a PR for these features. I'd like closeOnScroll to default to false to make the behavior consistent with older versions though.