Move traverseS_ to Foldable (alongside traverse_) and add syntax
Move sequenceS_ to Foldable
Merge pull request #290 from bmjames/state

Move traverseS_ to Foldable
Fix EitherT.||| infinite recursion
Merge pull request #291 from wemrysi/eitherT-orElse-loop

Fix EitherT.||| infinite recursion
Implement Foldable[Stream]#foldLeft in terms of scala.Stream#foldLeft

This fixes SOE on Foldable[Stream].foldLeft on large streams.
Merge pull request #292 from bmjames/scalaz-seven

Implement Foldable[Stream]#foldLeft in terms of Stream#foldLeft
convert scala.Either to \/