Remove AMRulesClassifier (and others) from master branch
Merge pull request #1 from joaomaiaduarte/master

AMRules and RandomAMRules
Add multi-target code
Add multi-target instances
Merge branch 'joaomaiaduarte-multitarg' into multitarget
Add multi-target tab
Update MultiTargetInstanceStream
Update ArffFileStream
Fixed bugs related with MultiLabel/SingleLabel representation (for
backward compatibility)