always raise parse error exceptions in multi/exec pipelines as a result of this
server change: https://groups.google.com/forum/?hl=en&fromgroups=#!topic/redis-db/VUiEFT8U8U0
bump to 2.7.2
Implement support for passing an arg to INFO command.
Fixed bug in list_or_args() helper function in python3.x
Improved testing for multiple interpreters support

- Added version "3.3" to .travis.yml
- Added configuration file to support testing with tox
Merge pull request #302 from imankulov/fix_list_or_args

Fix in list_or_args() function
Fixed bug in bitcount with start or end param equal to 0
Merge pull request #303 from pims/master

Bitcount start end params raised Exception when equal to 0
Leave handling of older versions for INFO cmd  to the user.
Fix parsing of floats in sub dicts in INFO cmd.
Merge pull request #301 from aouyar/master

Implement support for passing an arg to INFO command
Update README.md
Update README.md
Merge pull request #305 from saidimu/master

A corrected README on publishing from a PubSub object.