feat(google-maps): update wrapper to support v2 of the plugin (#1759)

* update google maps

* more updates

* add BaseClass

* add BaseArrayClass

* add BaseArrayClass constructor

* finish up BaseArrayClass

* add Environment class

* improve docs and add missing functions to GoogleMap class

* improve TileOverlayOptions interface

* add types to constants

* add ILatLng interface

* improve types in BaseArrayClass

* fix geocoder return type

* use Cordova decorator for geocoder

* document CameraPosition and add missing duration property

* document circle class and add update functions

* tslint

* remove extra decorator

* add setVisible and getVisible to Circle class

* complete Environment class

* add convenience method to return instance of environment

* add more classes to docs

* re-organize plugin definition

* document GroundOverlayOptions

* complete GroundOverlay class

* add and complete HtmlInfoWindow class

* complete LatLngBounds class

* update MyLocation interface

* complete GoogleMap class

* fix TERRAIN spelling

* complete Marker class

* complete Polygon class

* complete TileOverlay class

* remove setDebuggable and isAvailable

developer said they're not suited for users