Fix namespacing issue in rdf CLI.

Author: gkellogg

bin/rdf

@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
-$:.unshift(File.expand_path(File.join(File.dirname(__FILE__), '..', 'lib')))
+$:.unshift(File.expand_path("../../lib", __FILE__))
 require 'rubygems'
+require 'rdf'
 
 options = RDF::CLI.options(ARGV)