Add in ability to click on polygons

You can now catch polygon click events in PhoneGap, iOS supports all types such as polygon, polyline, circle, etc whereas Android is only polygons at this point.
Update Android GroundOverlay ID to match iOS
Add in touch events for Circle and GroundOverlay on Android
Merge branch 'issue123' of git://github.com/lookaflyingdonkey/phonegap-googlemaps-plugin into lookaflyingdonkey-issue123

Conflicts:
	src/ios/GoogleMaps/GroundOverlay.m
	www/googlemaps-cdv-plugin.js
Merge branch 'issue123' of git://github.com/lookaflyingdonkey/phonegap-googlemaps-plugin into lookaflyingdonkey-issue123