lme4 1.1-21 going to CRAN soon

The CRAN maintainers have asked for another lme4 update to fix some
testing issues. We've also made the following few changes

  USER-VISIBLE CHANGES:

   ? ?bootMer? now traps and stores messages, warnings, and errors
   ? ?bootMer? returns an object of class ?c("bootMer","boot")?; new
?print? and ?confint? methods for class ?bootMer?
   ? small changes to wording of singular-fit messages

---

We don't anticipate any downstream problems (we have run
reverse-dependency checks -- but we have missed problems before!), but
would be happy to hear about any problems, or relatively straightforward
bug fixes/feature requests that we should try to squeeze into the next
CRAN release (CRAN rules policies discourage us from submitting new
releases more frequently than every 1-2 months).

 [In case you're thinking of asking, "implement flexible correlation and
heteroscedasticity structures at the level of residuals and groups" is
not relatively straightforward :-( ]

  cheers
    Ben Bolker