deparsing very long RE terms (#246)
smarter fix for #246
add 'scales' to plot.thpr arg list
draw.upper/draw.lower for splom.thpr; check conf range for xyplot.thpr
specify start in boundary tests for back-compatibility

prep. for new starting-value code
Merge pull request #245 from ggrothendieck/master

better starting values for 1|f lmer models
don't use new IC code if simulating (model response missing)
loosen test tolerance for new starting values
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Merge pull request #247 from ggrothendieck/master

lmerperf vignette
lmerperf vignette tweaks
more vignette tweaks
sigh, add library(optimx) to lmerperf
sync to master