Merge pull request #269 from matfed/master

fixing too many hashes generated bug
Different keys for different output records (important for hbase)
Refactored and extended test of logical evaluator
Added two new filters to statistics generator
Merge branch 'master' of git://github.com/CeON/CoAnSys
Merge pull request #270 from acz-icm/master

Work on statistics generator