Added Nominatim support, fixed reverse in googlev3
Update point.py to include additional descriptions

Relaxed the regular expression to match anywhere in the given string, and also to match strings in the format: N 39°20' 0'' / W 74°35' 0'' --- note the degree, the NW before lat/long instead of after, and the double single quote ('') instead of a single double quote for the seconds.
added support for Yahoo! BOSS Geo PlaceFinder