Merge pull request #3 from jbrichau/master

Removed erroring tests because they were testing for non-ported functionality
Finish the #split:  and #join: protocol. Added lots of remaining tests and made them green. Only one test fails and I don't know why.
#reset should use instVar 'itsCollection' not the none-existing 'collection'
Merge pull request #4 from marianopeck/master

Finish the #split:  and #join: protocol.