------------------------
* The ``watch`` context manager now allows you to either provide
a callback or do an explicit check afterwards (**warning**: this change
is not backwards compatible, please update your fabfiles)
* Add support for some network-related operations:
* get the IPV4 address assigned to an interface
* get the list of name server IP addresses
* The ``services`` module now supports both upstart and traditional
SysV-style ``/etc/init.d`` scripts (thanks to Selwin Ong)
* The ``virtualenv`` context manager can now also be used with ``local()``
(thanks to khorn)
* The ``supervisor`` module now uses ``update`` instead of ``reload``
to avoid unnecessary restarts (thanks to Dan Fairs)
* Add support for OpenVZ containers (requires a kernel with OpenVZ patches)
* ``pip`` can now use a download cache
* Upgrade Redis version to 2.4.17
* Misc bug fixes and improvements
* Support for Ubuntu 12.04 LTS and Debian 6.0
* Documentation improvements