Support for v3 Google Geocoding API, v2 no longer works, fixes #50

For more information, see the following issue on GitHub:
https://github.com/geokit/geokit/issues/86
Merge pull request #51 from dhedlund/google3_geocoder

Support for v3 Google Geocoding API, v2 no longer works, fixes #50
Deploy calagator.org with a remote_cache strategy
Allowing user to export venue events to an .ics
Adding some specs
Add a webcal-protocol link to venue ICS export
Increase maxlength of latitude/longitude fields

Closes #49