Added a punctuation stripping function
added methods for accessing sample corpus
Strip punctuation for all fingerprint extraction and use word tokenization for anchor hashing. Also uses utility functions to access sample_corpus
Use utility to get source/test files
Use util to get corpus listings
Added winnowing to fingerprint_extraction
Merged Tony and Marcus changes
Fixed relative importing issue
Fixed some other extension/relative path issues
One more file name fix
Got rid of fingerprint extraction testing that wasn't being used
Merge pull request #12 from NoahCarnahan/anchor_fix

Anchor fix, resolved conflicts with tony/marcus changes, and other extrinsic clean up
Delete .nfs.2005124b.075d

Removed an os file that was erroneously committed to repo.
Use ExtrinsicUtility's constants and change tabs to spaces :)
Use cPickle instead of pickle. It's faster because c.
Cleaned ground_truth file.
Fixed broken path.
Added ExtrinsicPassage.
Moved XML parsing to util
Added support for app