[referencer] Library Targets

[Aaron Seilis]

Hey all,

As you're probably all aware, there is a new major release of
gtk*/GNOME set for next week. What versions of the libraries are we
targeting? I've been able to compile against GTK+ 2.x in the past, but
GTK 3.x is going to take some work. If people want to switch to the
newer libraries, we should probably target the dev releases (they are
in a RC2 stage at the moment, so they shouldn't change much) to avoid
duplicating effort.

Aaron Seilis