minor changes to llk export, new ntape proof

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1873 85d21ef8-add0-11de-ae77-5bfb9c5a3f34
added format llk and hol2fol(FSequent) to cli

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1874 85d21ef8-add0-11de-ae77-5bfb9c5a3f34