Add reverse geocoding test
Added geonames as a new provider for reverse geocoding
Refactor & add Yahoo PlaceFinder as a provider
formatting fix
readme for Yahoo
adapt geoapi so that it handles both exact matches and multiple results. Also, handle errors.
Yahoo API does not really seem consistent, sometimes sends Result, sometimes Results
Merge pull request #4 from sylvinus/master

Added geonames & yahoo as a new providers for reverse geocoding + tests