Start by reenabling common tests

git-svn-id: http://myrrix-recommender.googlecode.com/svn/trunk@575 0d189622-dca1-7e23-9e30-e8815eb7bd2f
Issue 65 fix error when eval data has tags

git-svn-id: http://myrrix-recommender.googlecode.com/svn/trunk@576 0d189622-dca1-7e23-9e30-e8815eb7bd2f