A bit of squeezing to optionally include the Acknowledgments on the first
four pages:

- If Figure 1 is placed on page 3, then only the references are on page 5.
- If Figure 1 is placed on page 4, the acknowledgments end up on page 5
  as well (but the overall number of pages is not changed).



git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partykit@630 255f4249-2263-4417-b1ea-8498779e27a7