Code reorganization, pt.1:

uiserver/kleo-assuan.h:class assuan_exception

-> utils/exception.h:class Kleo::Exception

uiserver/kleo-assuan.h:#define assuan_assert

-> utils/kleo_assert.h:#define kleo_assert

Fix utils/log.cpp to use a (new) Kleo::Exception

This opens the way for much more of uiserver/ to go to other subdirs.

svn path=/trunk/KDE/kdepim/kleopatra/; revision=768619