extended testcase for ConditionalUniqueColumnCombination toString()
implemented pattern tableau
added \r  for line ending and update expected string in testcase
Merge branch 'SubsetGraph' into pattern_tableau
using pattern tableaus for result
small toString() change
added copy() method to PositionListIndex
Merge branch 'master' into PositionListIndex
Merge branch 'master' into pattern_tableau
changed return type from Set  to TreeSet as the ordering of the TreeSet ist required by caller
extended pattern tableau by whitespace padding
Merge remote-tracking branch 'origin/pattern_tableau' into PositionListIndex
renamed copy() to clone()
changed ImmutableList to List
fixed typo in composite
added missing javadocs
added missing javadocs
changed "\r\n" to system specific line separator
changed lineSeparator back to \r\n until a fix is found
stick with \n newline character until GWT supports platform specific newline characters