README fixes
SCDL: correct forcibly coordinates for regions (fixes #6758)
Allow both geopy 0.95.1 and later versions (fixes #6752)

As of geopy 0.96, the geopy.geocoders.bing.Bing class
no longer has a `url` instance variable, and uses
`api` instead. This change should work with both
geopy 0.95.1 and 0.96+.
Merge pull request #4 from anarchivist/geocode-fixes-6752-6758

Geocoding fixes for #6752 and #6758