Noun phrase parsing now returns tree instead of string. TODO: Use the tree in opinion target replacement

Lots of changes, started working on ConceptNet, CoreNLP, in order to prepare SemEval data for training classifier.

Improved classifier noise reduction. Implemented pure classifier semantic analysis in analyzze_data.py with Pearson Coefficient 0.62

1. Created python script for prepping review data. 2. Python script for analysing data now creates RA and QBAF for reviews. 3. Created .gitignore