Fleshed out Scaladoc for Or, and removed transform from Accumulating. Will do
a transform like the one on Try instead.
Bumped rev to 2.0.M8
private[scalatest] out of the public interface the NoArgTest factory, for which I
have yet to see a justifying use case.
Added a transform method to Or that is like the one in Try. A kind of map of either one side or the other.