Use a dictionary to map url endpoints and Twisted web Resources.
Add jsonfig and a config for setting the port of the local server.

Settings for the site can be set inside atlas/config.json, rather than inside
the code itself.
Set the template directory in config.json, rather than atlas.resources
Set the mongodb connection settings in config.json
Merge pull request #1 from rockstar/url-mapping

Use a dictionary to map url endpoints and Twisted web Resources.
Merge pull request #2 from rockstar/config

Add configuration support