Refine graph visualization
Added item-based similarity
Added similarity scores
added user based recommendations and cross validation interface
added test suite to measure precision
Varied numUsers
added CV for items, changed item.py to not do duplication elim
merge
VS for item based
Graph over numUsersRange
Merge branch 'master' of https://github.com/darylchang/RedditRecs

merging master
Updated cross_validation.py
Created graphs for varying number of users and percentage of users
Fixed problem with recommending active subreddit
changed user.py to pickle featureVectors
Made featureVectors into nested dict and wrote to dump file
Added data files
Removed pickling of subToUser and featureVectors