Log Message:
Update to 2.0.18

Upstream changes:
Changes to Version 2.0-18

    o Bug fix to boot with type="residual"

    o Added densityPlot() function.

Changes to Version 2.0-17

    o Add a variable to AMSsurvey.

    o Fix to residualPlots to compute lack of fit tests with missing values and glms.

    o Fix to residualPlots with a 0/1 variable not declared a factor.

    o Boxplot() now works properly with at argument passed to boxplot() via ... \ 
(contribution of Steve Ellison).

    o qqPlot.lm() now works with "aov" objects (fixing problem \ 
reported by Thomas Burk).

    o Small fixes to code and docs.

Changes to Version 2.0-16

    o Fixed bug in printing of hypotheses by linearHypothesis(), where numeric
constants of the form 1.* or -1.* were printed incorrectly (reported by Johannes \ 
Kutsam).

    o Fixed a bug in showLabels() with multiple groups in the scatterplot() and \ 
scatterplotMatrix() function.

    o linearHypothesisTest() now tolerates newlines and tabs in hypotheses \ 
(suggestion of David Hugh-Jones).

    o two bugs fixed in Boot() (found by David Pain) changed argument f to f. in \ 
bootCase().

    o summary.Boot(), confint.Boot() and hist.Boot() handle aliases correctly.

    o Boxplot.formula() now accepts more than one conditioning variable \ 
(suggestion of Christina Yassouridis).

    O Boxplot() now properly handles at argument passed through via ... to \ 
boxplot() (contribution of Steve Ellison).

    o Small fixes.

Changes to Version 2.0-15

    o Added an argument coef. to linearHypothesis so tests of the linear \ 
hypohtesis form can be computed without reference to a fitted model

    o Added a linearHypothesis.nlsList method

    o Added an nls method for Boot

    o Recode() introduced as alias for recode() to avoid name clash with Hmisc.

    o residualPlots for glms now ignore starting values for the computing \ 
algorithm when computing lack of fit tests; starting values previously caused an \ 
error.

    o Marginal Model Plots now allow conditioning on a categorical variable.

Changes to Version 2.0-14

    o Smoothers now given as arguments to scatterplot(), scatterplotMatrix(), \ 
residualPlots() and other functions; gamLine(), loessLine() (default), and \ 
quantregLine() smoothers provided.

    o linearHypothesis.mer() and Anova.mer() now consistent with pbkrtest \ 
version 0.3-2.

    o Small changes and fixes.

Changes to Version 2.0-13

    o Added point marking (id.n, etc.) to dataEllipse

    o Changed the default for id.method with the invTranPlot to "x".

    o The ncvTest has been rewritten for stability, and unneeded 'data', \ 
'subset' and 'na.action' argument have been removed

    o Added new function 'Boot' that is a simple front-end to boot::boot that \ 
will be useful when bootstrapping regression models.  Implemented for lm and \ 
glm, but this is likely to work for many other S3 regression models with and \ 
'update' method, 'subset' argument.

    o Fixed bug in 'compareCoefs' with non-full rank models

    o Modified 'bootCase' to return a matrix of class c("bootCase", \ 
"matrix") so generic functions can be written to summarize these \ 
objects.

    o Minor changes to the returned value of showLabels to give both the label \ 
and the corresponding row number.  showLabels documentation tweaked.

    o Improved handling of center.pch argument to ellipse() (suggestion of Rob \ 
Kushler).

    o New test argument for linearHypothesis.mer()  and test.statistic argument \ 
for Anova.mer() for F-tests with Kenward/Roger df, provided by pbkrtest package.

    o Anova.mlm() now will do univariate repeated-measures ANOVA even if the \ 
error SSP matrix is singular.

    o hccm() will now accept a weighted linear models (suggestion of Stefan \ 
Holst Bache).

    o deltaMethod.default() now applies coef() and vcov() to a model for which \ 
these are supported (generalizing a suggestion by Scott Kostyshak).

    o Fixed handling of labels argument in scatterplot.formula() and \ 
scatterplotMatrix.formula().

    o Fixed qqPlot.default() so that it honors line="none" (bug \ 
reported by Rob Kushler).

    o Added new default method for confidenceEllipse(), which now can construct \ 
confidence ellipses for linear functions of coefficients.

    o globalVariables() called for R 2.15.1 or later.

    o Fixed bug in logit() when percents=TRUE and largest percent is 1 (reported \ 
by Eric Goodwin).

    o Added radius argument to scatter3d() (suggestion of Antonino Messina).

    o Fixed spurious errors message in scatter3d() when groups present but \ 
surface=FALSE (reported by David L. Carlson).