Commiting basic polarity structure and parsing.

Including basic resources from R's qdap, and modified polarity
extraction script.

Stills needs to get individual word polarity values for file.

I've implemented a number of useful utility functions for walking the
classpath and parsing reviews. Check out the util package.

Also see test cases for a demonstration of some classes I've provided.
A nearly working version of polarity. Still having issues with multi
string words.
Polarity now presents a file with the positive and negative values,
weighted.
Polarity now runs for all files. Need to make adjustments to the reviews
based on individual analysis.
Successlly parsed all reviews with the polarity classes.