annotationData does not get added to store in v2

The store plugin in current master does not add annotationData to the submitted data.

my quick fix (starting at line 195):
```
 # add annotationData
    if action is "create" or action is "update"
      obj = $.extend(obj, @options.annotationData)
```
(see https://github.com/robcast/annotator/blob/master/src/plugin/store.coffee)

or am i missing something?