Introduce an attribute to limit the number of consecutive calls to pdflatex, to avoid infinite recursion loops

git-svn-id: svn+ssh://rubyforge.org/var/svn/tioga/trunk/tioga@652 f6f669a6-2b79-499e-8f05-be2b991fc3d0
Make the number of pdflatex calls available + remove measures that are now irrelevant

git-svn-id: svn+ssh://rubyforge.org/var/svn/tioga/trunk/tioga@653 f6f669a6-2b79-499e-8f05-be2b991fc3d0