Document that transforms are ignored in publish functions

Wasted a bunch of time trying to figure out why the transform function was completely ignored by the server-side find() in a publish function.

It would be great if Meteor warned explicitly if a transform function was passed to find() in a publish function.

See also http://stackoverflow.com/questions/18093560/meteor-collection-transform-is-it-done-on-the-server-or-on-the-client-or-it-de