Add beginnings of libkleopatraclient. Currently, the actual connecting to Kleo isn't implemented yet, and libassuan is acting up, so there's some configure time magic to find out whether libassun is linkable to DSO's (which I've given up on, if someone is in the know about this, please fix), and the whole thing is optional (but defaults to on, if any assuan is found).

svn path=/trunk/KDE/kdepim/kleopatra/; revision=805880