WIP: Core obj handling the pipeline

[cuducos]

This PR is complimentary to #37:

• It exemplifies how can settings and adapter modules can be helpful to make a Core generic pipeline
• It starts to handle what was called irregularities as suspicions for semantic sake

settings and adapter module are just barely organized. Some ideas of improvements:

• Every classifier could have a name property (so settings.CLASSIFIERS could be a simple list);
• Some general variables (settings.UNIQUE_IDS and settings.VALUE) should be integrated to the adapter — and maybe Core will only require the adapter (not settings);
• Maybe in the future we don't even need the settings module (it could be integrated in the adapter).

Hint: this talk about class objects in Python can be helpful.

[coveralls]

Coverage decreased (-81.8%) to 14.65% when pulling 054ddac on cuducos-creating-core-module into 40af34e on anaschwendler-creating-core-module.

[coveralls]

Coverage decreased (-11.5%) to 84.95% when pulling a0351d1 on cuducos-creating-core-module into 40af34e on anaschwendler-creating-core-module.