added documentation.txt
added tf_idf and TEST txt files in CorpusFolder
adding Brown corpus
files in the Brown corpus end with .pos, not .txt
Merge pull request #1 from patxu/master

adding Brown corpus
added bash file for quick running
changed directory
removed irrelevant assignment files
deleted brown/ directory, to make compatible with tf_idf code
removed test corpusfolder files - outfile and penntreebank.txt
adjusted arguments to match corpus folder structure
Merge remote-tracking branch 'upstream/master'
updated structure
updated headings
completed PoS parsing
Merge pull request #2 from patxu/master

files in the Brown corpus end with .pos, not .txt
Merge branch 'master' of https://github.com/irenelfeng/SummaryTweets
changed so unrecognized words get a high tf-idf score
added a bunch of comments
comments on tf_idf