Redis

* Python 3.x support! Big thanks to Alex Grönholm.
* Fixed a bug in the PythonParser's read_response that could hide an error
from the client (251).

* Changed (p)subscribe and (p)unsubscribe to no longer return messages
indicating the channel was subscribed/unsubscribed to. These messages
are available in the listen() loop instead. This is to prevent the
following scenario:
* Client A is subscribed to "foo"
* Client B publishes message to "foo"
* Client A subscribes to channel "bar" at the same time.
Prior to this change, the subscribe() call would return the published
messages on "foo" rather than the subscription confirmation to "bar".
* Added support for GETRANGE, thanks Jean-Philippe Caruana
* A new setting "decode_responses" specifies whether return values from
Redis commands get decoded automatically using the client's charset
value. Thanks to Frankie Dintino for the patch.

* redis.from_url() can take an URL representing a Redis connection string
and return a client object. Thanks Kenneth Reitz for the patch.

* ConnectionPool is now fork-safe. Thanks Josiah Carson for the patch.

* AuthenticationError will now be correctly raised if an invalid password
is supplied.
* If Hiredis is unavailable, the HiredisParser will raise a RedisError
if selected manually.
* Made the INFO command more tolerant of Redis changes formatting. Fix
for 217.

* Buffer reads from socket in the PythonParser. Fix for a Windows-specific
bug (205).
* Added the OBJECT and DEBUG OBJECT commands.
* Added __del__ methods for classes that hold on to resources that need to
be cleaned up. This should prevent resource leakage when these objects
leave scope due to misuse or unhandled exceptions. Thanks David Wolever
for the suggestion.
* Added the ECHO command for completeness.
* Fixed a bug where attempting to subscribe to a PubSub channel of a Redis
server that's down would blow out the stack. Fixes 179 and 195. Thanks
Ovidiu Predescu for the test case.
* StrictRedis's TTL command now returns a -1 when querying a key with no
expiration. The Redis class continues to return None.
* ZADD and SADD now return integer values indicating the number of items
added. Thanks Homer Strong.
* Renamed the base client class to StrictRedis, replacing ZADD and LREM in
favor of their official argument order. The Redis class is now a subclass
of StrictRedis, implementing the legacy redis-py implementations of ZADD
and LREM. Docs have been updated to suggesting the use of StrictRedis.
* SETEX in StrictRedis is now compliant with official Redis SETEX command.
the name, value, time implementation moved to "Redis" for backwards
compatibility.