Parallelize, within a reducer, comptuation of iteration, rec, similarity in Computation Layer

git-svn-id: http://myrrix-recommender.googlecode.com/svn/trunk@541 0d189622-dca1-7e23-9e30-e8815eb7bd2f
Add estimateForAnonymous method

git-svn-id: http://myrrix-recommender.googlecode.com/svn/trunk@542 0d189622-dca1-7e23-9e30-e8815eb7bd2f