alias Seq.toArray/toList/toFSeq

[ntwilson]

All are partial functions for infinite sequences. I don't think we should get rid of them like we do some of the other Seq functions that are partial for infinite sequences, because these are really the only functions available to get back to a finite collection if your collection type is seq. But perhaps we could make aliases such as unsafeToArray with a good XML comment to make clear that this doesn't work for infinite sequences (and there's no runtime check to make it safe).