Refactoring ResultOfCollectedGenTraversable.
Removed have methods for length and size from NotWordForCollectedGenTraversable/Seq.
Dropped the ResultofCollectedGenSeq entirely.
Have MapShouldWrapper extend AnyRefShouldWrapper. Also dropped have
methods from JavaMapWrapper for length and size.
Made ResultOfCollectedGenMap extend ResultOfCollectedGenAnyRef.
Removed a few more unneeded have methods for length and size.
Out of superstition, say scala.collection everywhere to make sure I'm sure
we're using the general traits.