A class to store most interesting words.

Add a class to store the words with highest and lowest probability of
being spam. Will be used for the classifier.
Simplify Champion class.

Class Champion has been simplify to store only one list of interesting
tokens (or words).
A class to classify email.

This class classifies email using the file created during training.
Added probability calculations
Merge pull request #3 from SCastaneda/classifier

Classifier