changed ppEqualityProof to allow proofs to be composed inside of lambdas
changed ppEqualityProof to allow proofs to be composed inside of lambdas

git-svn-id: 9ecf60ce9baff443e30a0472d3fd222fcb8117cf@8912 7b97033b-253e-4a5c-9b07-e25f9089a9fd

KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware