Django-rosetta

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* Fix: value missing in context

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* Support for Django 1.5 and HEAD, support for Python 3.
* Upgraded bundled polib to version 1.0.3 - http://pypi.python.org/pypi/polib/1.0.3
* Support timezones on the last modified PO header. Thanks jmoiron (Issue 43)
* Actually move to the next block when submitting a lot of translations (Issue 13)
* Add msgctxt to the entry hash to differentiate entries with context. Thanks metalpriest (Issue 39)
* Better discovery of locale files on Django 1.4+ Thanks tijs (Issues 63, 64)
* List apps in alphabetical order

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* Switched to a pluggable storage backend model to increase compatibility with Django 1.4. Cache and Session-based storages are provided.

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* Added a testproject to run tests
* Updated french translation. Thanks, BertrandBordage
* Merged sleepyjames' PR that fixes an error when pofile save path contains '.po' in the path
* Merged rory's PR to correcty handle plural strings that have a leading/trailing newline (Issue 34)

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* Django 1.4 support (Issue 30, 33)
* Better handling of translation callbacks on Bing's translation API and support of composite locales (Issue 26)

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* Updated polib to 0.7.0
* Added ROSETTA_POFILE_WRAP_WIDTH setting to track the line-length of the updated Po file. (Issue 24)
* Renamed the ``messages``context variable to ``rosetta_messages`` prevent conflicts with ``django.contrib.messages`` (Issue 23)