Fixes #227

Added INCRBYFLOAT and HINCRBYFLOAT commands

Added PEXPIRE/PTTL support (redis 2.6.0)

pass `raise_on_error=False` to `pipeline.execute()` if you prefer the old
behavior.

Adding test support for LPUSH/RPUSH with multiple arguments for Redis version >=2.4.0

Feature/Bitopt and Bitcount

Conflicts:
redis/client.py
redis/utils.py

New classifiers in setup.py

Python 3.2+ compatibility

previous commit

PEP 8 cleanups

`from_url()` is now implemented as a classmethod. The previous
implementation always returned i...

expire() and setex() now accept timedelta objects.

This mimics the datetime support provided by `expireat()`.

added support for GETRANGE

score_cast_func doesn't work with desc condiction

Conflicts:
redis/connection.py

Conflicts:
redis/__init__.py

Open socket connection with mode='rb' instead of 'r' to support IronPython

Open socket connection with mode='rb' instead of 'r'.
From Python documentation: ...when openi...

Fix connection errors after fork()

Allow empty watches in Redis.transaction()

If the connection encoding is set to utf-8, pass the socket read results
through decode()

HiredisParser was not previously passing the character encoding to the
hiredis.Reader constructo...

Correct typos in README.md

Add support for DEBUG OBJECT command