Updated test cases, EuclidianDistance algorithm

__init__.py: removed some old print statements
filter.py:   computeScoreTwo --> computeSimilarityScore and corrected
             return value
similarityscorealgorithms.py:  changed range of Euclid to (0,1]
testScorers.py:  removed some value tests, added a test to check a
                 recommendation exists when it should