Adjusted patterns of filenames that should be ignored by svn and R CMD
build.

* Added new patterns: hidden files (filename starts with a dot), svn
  temporary files.

* Some patterns are already in the default configuration of svn, but
  they are made explicit here (good in case a default pattern has been
  dropped).


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@796 edb9625f-4e0d-4859-8d74-9fd3b1da38cb