Extract configs to another project in order to make this one public some day

[amessinger]

The private project would pull this one as a dependency

[benoitbryon]

Apart from the "make this project public", using external configuration files would improve the dependency graph between crappyspider and web applications:

• URLs are created and maintained in web applications (a.k.a Django projects)
• this project (crappyspider) is valid for a given version of web applications, i.e. when an URL is updated in a project, we have to update it here too. In the meantime, crappyspider is broken
• moving configuration inside web applications would make the workflow more consistent: list of URLs will be updated along with the code, and crappyspider would not be affected by changes in applications.

[amessinger]

As seen #17, config files will be moved to the crawled projects themselves. We will keep a sample file in the repository.

[amessinger]

Done in #17