Make it working + additional functions

[alexott]

This pull request implement following:

• Fixes the error when using with current version of scikit-learn: AttributeError: 'LogisticRegression' object has no attribute 'transform'
• Adds 2 handy functions for saving & loading of trained models, so for prediction it's isn't required to retrain model
• Adds configuration file that enforces coding style for source files (it's supported by many editors)