Ported to Ogre 1.9

Hey Konrad,

I've ported Opde to ogre 1.9, it builds but does not work.

OGRE.pc needs to be manually edited if it lacks -lboost_thread -lboost_system (at least on Arch it lacks these libs). I hope this gets fixed soon.

There is a bug somewhere (it seems to be in Ogre's ZipArchive) that causes segfaults all around. I've fixed most of them but a few remain, still.

I've started a discussion on the issues here: http://www.ogre3d.org/forums/viewtopic.php?f=4&t=80836