Cleaned up lib integration. Moved more lib settings to settings.py. Better UTF-8...

Cleaned up lib integration. Moved more lib settings to settings.py. Better UTF-8 support in z3950 search.

Still not perfect, but cleaner. Hard-coded references to EG server are
now in settings.py, as are the names of other servers (Z39.50, SIP).

I had been using a file called 'marctools' by Joel Hardi to do what
turned out to be basic UTF-8 encoding, so I've replaced his code with
a simple regex-based substitution (in yaz_search.py).

git-svn-id: svn://svn.open-ils.org/ILS-Contrib/servres/trunk@454 6d9bc8c9-1ec2-4278-b937-99fde70a366f