R-devel introduced more anal tests on suggests/imports etc.

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2582 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
TukeyHSD.aov is neither exported nor documented since R revision 63605 (2013-08-17)

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2583 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
prepanel.default.cloud is exported from lattice

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2584 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
vegan::: never needed within functions

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2585 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
vegan depends on lattice and version up to 2.1-33

git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/vegan/pkg/vegan@2586 edb9625f-4e0d-4859-8d74-9fd3b1da38cb