Remove rubyforge reference. Update DOAP.

Author: gkellogg

etc/doap-ntriples.ttl

@@ -20,7 +20,7 @@
   doap:implements    <http://www.w3.org/TR/rdf11-concepts/>,
                      <http://www.w3.org/TR/n-quads/>,
                      <http://www.w3.org/TR/n-triples/> ;
-  doap:download-page <http://rubyforge.org/projects/rdf/> ;
+  doap:download-page <http://rubygems.org/gems/rdf/> ;
   doap:bug-database  <http://github.com/ruby-rdf/rdf/issues> ;
   doap:blog          <http://ar.to/>, <http://blog.datagraph.org/> ;
   doap:vendor        <http://datagraph.org/> ;

etc/earl-ntriples.ttl

@@ -20,7 +20,7 @@
   doap:implements    <http://www.w3.org/TR/rdf11-concepts/>,
                      <http://www.w3.org/TR/n-quads/>,
                      <http://www.w3.org/TR/n-triples/> ;
-  doap:download-page <http://rubyforge.org/projects/rdf/> ;
+  doap:download-page <http://rubygems.org/gems/rdf/> ;
   doap:bug-database  <http://github.com/ruby-rdf/rdf/issues> ;
   doap:blog          <http://ar.to/>, <http://blog.datagraph.org/> ;
   doap:vendor        <http://datagraph.org/> ;

rdf-turtle.gemspec

@@ -10,7 +10,6 @@ Gem::Specification.new do |gem|
   gem.license               = 'Unlicense'
   gem.summary               = "Turtle reader/writer for Ruby."
   gem.description           = %q{RDF::Turtle is an Turtle reader/writer for the RDF.rb library suite.}
-  gem.rubyforge_project     = 'rdf-turtle'
 
   gem.authors               = ['Gregg Kellogg']
   gem.email                 = 'public-rdf-ruby@w3.org'