Fixed error if partitioner returns more than 1 value
Fixed error in logical evaluator
Added constructors (default and copy) for SortedMapWritableComparable
Added FilterNonEmpty to statistics generator
Merge branch 'master' of git://github.com/CeON/CoAnSys
Test for logical evaluator
Merge pull request #268 from acz-icm/master

New filter, some bug fixes, test for logical evaluator