Add support for geolocation module

This seems OK.

#0 commited pushed to 7.x-2.x, thanks!!!

this one needs reroll against gmapextended style

I'm a bit confused by this, as the release notes for 2.7 say this is in: https://drupal.org/node/2024017, and the code appears to have it, but the issue is set to needs work. If there's a follow-up, it's best in a new issue.

I can report that the gmapextended style works fine with Geolocation module field data:

- set the data source to 'Choose lat & long fields' in the style options
- add the Geolocation field to the view *twice*, setting one to render latitude and one to render longitude
- assign those fields to the lat and long purposes in the style options

We dont need to reroll last patch, bc it is already at 7.x.-2.x-codefreeze branch.