setup versioning for libotk that is separate from libobrender (and libobparser for now), and bump library versions up to 4.0. also make the render versioning more explicit that it's for the render library not all of openbox
i know we broke backwards compatibility but noone uses it except obconf and it still works, so just leave the pkgconfigs as -3.0, and obconf2 and require version >= 3.3.990 instead.
change obrender-3.0 and obparser-3.0 to 3.4 because we broke backward compatibility
change how stuff is linked, this should make libtool and automake work nicely again I think
remove obconf from this tree. add versioning for the libraries and pkgconfig files for them.