Move plugins back in media/plugins

Using /usr/lib/OGRE/ as a hardocoded path is not portable. On some systems (namely, mine), the plugins are somewhere else. (e.g. in /usr/lib/x86_64-linux-gnu/OGRE) For the moment it's best to keep the plugins in media/plugins.
Improve error logging in LThing::LThing

Add a catch block for std::exception&s
Fix driver not spawning in kart (typo)
Remove extra __cdecl in direntSearch

Those are superfluous and ignored
Disable drifting

Until we fix it, drifting is not exactly an improvement