pass relevant named arguments from anova.cca to permutest.cca
extract all scores when setting x and y limits for plot
Merge pull request #60 from gavinsimpson/fix-argument-passing-in-anova

pass relevant named arguments from anova.cca to permutest.cca
Merge pull request #62 from gavinsimpson/fix-plot-limits-issue

extract all scores when setting x and y limits for plot
Add ordiareatest for the areas of convex hulls or ellipses in ordination

The function is bases on ordihull and ordiellipse and performs permutation
tests on the sizes of fitted convex hulls or ellipses. The tests are
one-sided and the alternative hypothesis is that the areas covered by
convex hulls or ellipses are smaller than random expectations.
Add print.ordiareatest
Document and export ordiareatest: passes R CMD check
Add permustats.ordiareatest
permutations need be transposed in permustats of ordiareatest
remove refs to R 2.14.0 in man/: we depend on later version of R
NEWS about ordiareatests
swsh_samp null models can be used with non-integer quantities

swsh_samp, swsh_samp_c and swsh_samp_r null models shuffle original
cell values and can also be used with non-integer data. They were
unnecessarily restricted to integers. The swsh_both models
redistribute individuals among non-zero cells and can only be used
with integer values.
Avoid $ with data frame, and force asp=1 in plotting maps of points
Avoid some $ signs in adonis examples
Remove $ from clamtest example
Remove dollars from mrpp and multipart examples
Use residuals(x) instead of x$residuals in permatfull examples
ordisurf has formula & data=, it does not need with()
clean up edits
Further clarification of swsh methods, like suggested by Peter Solymos