Added commands to the CLI in order to develop relevant cut-configuration functionality


git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1754 85d21ef8-add0-11de-ae77-5bfb9c5a3f34
fixes a bug in cnf construction (part of issue 248): no duplicate literals are constructed anymore.

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1755 85d21ef8-add0-11de-ae77-5bfb9c5a3f34
Changes in verit parsing.

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1756 85d21ef8-add0-11de-ae77-5bfb9c5a3f34