Animate active marker and bring it to front of every other marker layers.

```
Ability to move active marker to front and animate. Something like this 
http://yarealty.com/student/apartments/bedrooms/1#/interactive-map-view would 
be nice.
```

Original issue reported on code.google.com by `joab0...@gmail.com` on 27 Sep 2013 at 10:53
