Add getGWin method

getGWin returns the google maps infobox instance and allows you to do things you otherwise wouldnt be able to do
Merge pull request #674 from gitnik/master

Add getGWin method
fixed conflicts
Merge branch 'Antwan86-hotfix/draggable-state'
Create example of configuring a marker's anchor

The ability to configure a marker's anchor point using Google Maps is
less than intuitive. Although the documentation makes it sound like you
can configure it via a MarkerOptions object, that doesn't seem to work
with this library.  As such, you need to configure the anchor point on
the image itself.  This example demonstrates how to do that.
Merge pull request #677 from mminella/markerAnchorExample

Create example of configuring a marker's anchor
Merged upstream 'master' branch into 'feature/maptype-support' branch