Localshop

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* Fix a bug which resulted in throwing 404's for packages which have a dot in
the name.

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* Use django-userena for authentication
* Use django-configurations and now uses the optional custom settings at
~/.localshop.py. Logan is now also not used anymore.
* Add additional separate credentials for uploading and downloading from
the pypi instance (using access/secret keys).
* Implement support for 'pip search'
* Many other improvements! (thanks Jannis Leidel)

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* Use Django 1.4 and restructure the app layout
* Other minor bugfixes

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* Don't display the download_url or home_page url if they are unknown
* Add correct rel-tag to the urls

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* Use the correct LOGIN_URL setting.
* Add download_url and home_page url to the simple detail page. note that this
is currently not mirrored yet.

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* Implement configurable access control / ip check