add FAQ about LAPACK errors in cca/rda/capscale

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2605 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
tweak formatting

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2607 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
untested implementation of correlated species in parametric simulate.rda

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2608 edb9625f-4e0d-4859-8d74-9fd3b1da38cb