Implemented support for the GEO commands for Redis 3.2.0

[pfreixes]

The following commands have been implemented GEOADD, GEODIST,
GEOHASH, GEOPOS, GEORADIUS, GEORADIUSBYMEMBER.

[andymccurdy]

Thanks. I noticed you left all the return values as strings. It might be nice to convert some of them to Python types. Specifically:

GEOADD returns an int
GEODIST returns a double
GEORADIUS with the WITHDIST option returns a double

Thoughts?

[pfreixes]

@andymccurdy fair enough, sorry for the delay I was busy with some work stuff. Before tomorrow it will be done.

Cheers

[pfreixes]

A bit later but at last committed a new version where geo commands return Python native types, you can found these types in the UnitTests [1].

Ive casted all b values using nativestr, what do you think ? does it break the way of redis-py is returning the values from Redis?

[1] f1abb79

[andymccurdy]

Looks great, thanks. I'm merging now.

Question: Should we be returning doubles rather than floats? The GEO command docs [1] indicate the redis server returns doubles. Do Python floats offer enough precision?

[1] http://redis.io/commands/geodist

[autumnjolitz]

@andymccurdy Python floats are internally doubles.

You can see it here: https://github.com/python/cpython/blob/c30098c8c6014f3340a369a31df9c74bdbacc269/Include/floatobject.h#L17