final changes to usercf
merge conflicts
local and emr settings
downsample interactions in item CF
fixed downsample edge case
moved interaction cut to beginning of itemCF
plots and cleaned up extra user CF versions
Delete userBasedRecommenderB1.py
Delete userBasedRecommenderB2.py
Delete userBasedRecommenderB3.py
Delete userBasedRecommenderOld.py
added testing facilities to itemCF
Merge branch 'master' of https://github.com/evancasey/sparkler

* 'master' of https://github.com/evancasey/sparkler:
  Delete userBasedRecommenderOld.py
  Delete userBasedRecommenderB3.py
  Delete userBasedRecommenderB2.py
  Delete userBasedRecommenderB1.py
resolve merge conflicts