Adding proxy for geodesy service

This addresses https://github.com/geoadmin/mf-geoadmin3/issues/711

- This geodesy service is part of the API
- It may be used with HTTPS


http://api3.geo.admin.ch/reframe/lv03tolv95?cb=angular.callbacks._1&easting=582500&northing=138500

and

https://api3.geo.admin.ch/reframe/lv03tolv95?cb=angular.callbacks._1&easting=582500&northing=138500