Package up the "talks" app as a reusable Django app

[jrrickerson]

The Podium project is a useful tool for PyATL, but other meetup groups or other organizations might also benefit from it. Package up the "talks" app into it's own reusable Django app and prepare it for publication on PyPI.

• Ensure the app has no hard dependencies on anything outside of itself.
• Ensure templates can be overridden, url patterns can be easily included, etc. for any project.
• Add the required setup.py / packaging configuration for publication.
• Create a new repository to move the app into so it can be managed separately.
• Remove the app code from this project and add the newly packaged app as a dependency instead.