Removed commented code
Updated doc
 - Moved hiredis section down to get a better flow
 - Moved documentation section up closer to the top
 - Added what python3 versions is supported by this branch
Removed the workaround because it was allready implemented correctly in redis-py if you add 'decode_response': True as input argument to Redis client object.
Fixed broken test where the test created a new redis connection object but when running that code on python3 the optional argument "decode_responses" must be set to True for redisco to work correctly.