Feature Request: Change mapTypeId

[enkah]

Google Maps supports the following mapTypeId's as per https://developers.google.com/maps/documentation/javascript/maptypes

1. roadmap
2. satellite
3. hybrid
4. terrian

mapTypeId is declared within var map_options on line 1637 of RouteView.js, it can be manually modified to any of the above values.

The ability to select mapTypeId within the Configuration Dialog on RouteView.html would allow for users to change between their perfered Map Types.