Django-maintenancemode

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- Enable network specify in INTERNAL_IPS

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- Added management command to set maintenance mode on/off

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- Made sure the app runs on Django 1.8.

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- Got rid of dependency on setuptools
- Added ability to exclude specific paths from maintenance mode with the
``MAINTENANCE_IGNORE_URLS`` setting.
- Use RequestContext when rending the ``503.html`` template.
- Use tox for running the tests instead of buildout.
- Made sure the app runs on Django 1.4.

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- Minor documentation updates for the switch to github, expect more changes to follow soon.

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- Fixed an issue with setuptools, thanks for reporting this ksato9700