svnmeta: store youngest revision pulled from subversion This prevents re-pulling the same revision over and over, which was a problem when the most recent revision was a tagging revision that wouldn't exist properly in the revmap. This should also allow users to not re-pull huge volumes of commits that have no effect on the hg repository.

include Makefile *.rst
recursive-include tests *.py *.sh *.svndump *.txt