Generalized cut introduction now works for proofs compressable with cut formulas containing only one universal quantifier. Changes in cutIntroductionG: * all free and bound variables names are now 0-indexed. * added ForallLeftBlock and ForallRightBlock as macro rules for multiple quantifier intantiation.

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1659 85d21ef8-add0-11de-ae77-5bfb9c5a3f34