Merge pull request #13 from he7d3r/master

Add 'numpy', 'scykit-learn' and 'scipy' to requirements.txt
Adds draft config files, some notes on adhoc jobs and installation notes for Linux Mint to the readme.
Extends installation instructions to include NLTK info
Merge pull request #15 from halfak/scorer_work

Extends README information and add some notes
Refactors Feature and Datasource to be proper classes and have their own decorators for processing functions.
Fixes typos in documentation.
Fixes variable naming in demonstrate_extractor.py
Fixes more typos
Fixes other references to features variable in extractor demonstration
Merge pull request #16 from halfak/scorer_work

Refactors Feature and Datasource to be proper classes and have their own...