../VERSION -> ESSVER in ess-defs.texi

git-svn-id: https://svn.r-project.org/ESS/trunk@5755 0bbaf3bd-34e0-0310-bf65-c717079852d4
VERSION := 13.09  --  marking release-candidate

git-svn-id: https://svn.r-project.org/ESS/trunk@5756 0bbaf3bd-34e0-0310-bf65-c717079852d4