added a function performing the analysis of the ntape proof so far to the cli, use ntape(llkfilename,proofname) and get proof db, css, skolem introductions, struct and the mapping qn -> replaced abstraction

git-svn-id: http://gapt.googlecode.com/svn/trunk/source@1834 85d21ef8-add0-11de-ae77-5bfb9c5a3f34