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
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