* Adjusted the loading order of packages according to recommendations
  in the manual of the hyperref package
* Got rid of extra tildes (~) in the bibliography and citations of the
  vignette pdf by loading the babel package. I don't know why or how
  this works. The solution was found from the first hit of
  "bibliography tildes" (not quoted) on Google search.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@778 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
* Oversized code or comment lines wrapped or cut to fit into page margins
* Spaces added for clarity


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@779 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Formatting, reuse of a result

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@780 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Cosmetic adjustments

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dplr@781 edb9625f-4e0d-4859-8d74-9fd3b1da38cb