Lift Framework 3.0-RC2: Second Release Candidate

We saw an issue in RC1 that could be worked around, but we
felt it was easy enough to come across it without intending to
that it was worth releasing a second RC.

Fixes

• (#1783) JsCmds that produced HTML with events and eagerly
  evaluated that HTML content (e.g. by declaring a val toJsCmd
  instead of def toJsCmd) would produce the event handler JS
  even if the JsCmd in question was never sent down to the client.
  We now tie the JS for event handling to the JsCmd's content
  directly, so this pitfall can't be triggered. Thanks to Riccardo Sirigu
  for reporting this issue on the mailing list.