Committing "forgotten" changes that are already found in CRAN

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@838 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
dplR 1.6.0

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@839 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Preparing for dplR 1.6.1

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@840 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Removed the unused package "sidecap". It is missing from one of the CRAN check machines.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@841 edb9625f-4e0d-4859-8d74-9fd3b1da38cb