Added Iterator.continually, because
Added Iterator.continually, because

  val it = Stream continually (foo) iterator
  it.foldLeft(...)
grows without bound, and there needs to be a simple
reliable way to repeatedly side effect.


martijnhoekstra/scala,felixmulder/scala,scala/scala,jvican/scala,martijnhoekstra/scala,scala/scala,lrytz/scala,slothspot/scala,lrytz/scala,shimib/scala,slothspot/scala,jvican/scala,jvican/scala,jvican/scala,felixmulder/scala,shimib/scala,slothspot/scala,felixmulder/scala,jvican/scala,martijnhoekstra/scala,martijnhoekstra/scala,lrytz/scala,scala/scala,scala/scala,martijnhoekstra/scala,lrytz/scala,lrytz/scala,shimib/scala,felixmulder/scala,felixmulder/scala,shimib/scala,felixmulder/scala,scala/scala,felixmulder/scala,shimib/scala,slothspot/scala,jvican/scala,slothspot/scala,slothspot/scala,martijnhoekstra/scala,slothspot/scala,jvican/scala,lrytz/scala,shimib/scala,scala/scala