Add a dependency to geocoderBundle

[stephpy]

Hi,

I would like to know if you would be interested by an integration of https://github.com/willdurand/BazingaGeocoderBundle on this bundle. QueryService at this moment supports only Google. Since Geocoder is the reference in php for geolocate an address, ip, etc ... i guess it would be a good solution.

At this moment, when rate limit of google is exceeded, there is no way to fallback to an other one provider.

Would you be interested by an improvement like this ? I can contribute.