add basic support for writing plugins in Vala. No idea if we'd want to do

2007-03-24  James Livingston  <doclivingston@gmail.com>

        * configure.ac:
        * bindings/Makefile.am:
        * bindings/vala/Makefile.am:
        * bindings/vala/rb.deps:
        * bindings/vala/rb.vala:
        * bindings/vala/rhythmdb.deps:
        * bindings/vala/rhythmdb.vala:
        * plugins/Makefile.am:
        * plugins/sample-vala/Makefile.am:
        * plugins/sample-vala/rb-sample-vala-plugin.vala:
        * plugins/sample-vala/sample-vala.rb-plugin.desktop.in: add basic
        support for writing plugins in Vala. No idea if we'd want to do that
        in the future, but it's interesting to play with

svn path=/trunk/; revision=4976