Merge pull request #24 from dplanella/master

Refresh dependencies and split requirements.txt between dev and production
Bumped to 1.4.6.
Updated to Django 1.4.8 due to security issues.
Initial port from djangosnippets repo.

This includes many fixes for Django > 1.4 compatibility, renames
a model field (django_version to version) and updates the search
index to use the Haystack 2.x API.
Added Travis config.
added 404 test template
Added Travis image.
Added link to Travis page
Comment out Django 1.6 for now since the tests are broken due to django-simple-ratings not working there.
Downgrade django-registration for now.
Moved cab out of this repo.

Also upgraded a bunch of dependencies.
Updated README.
Use Searchbox as the search backend.
Updated requirements and add pyelasticsearch.
Fix gunicorn version.
Use secret key.
Downgraded raven again.
Use django-registration 1.0
Fix url template tags.
Use akismet spam fighter for comments.