Remove configuration resources from core module

[jnioche]

A new project can be generated using the archetype or by copying the files from there manually. We don't need the config elements in core, these would be specified by the user or generated by the archetype.

Note : crawler-default.yaml would remain in core to provide default values.

This would also fixe #61 as well.

[jnioche]

Removing the configuration files from core causes some tests to fail. Postponing this issue.

[jnioche]

Done in #4292e91

core now has no URL or ParseFilters loaded by default, nor does it have an example of Topology. This will prevent confusion about what it used and overridden when building the uber jars.