Add Ruby 2.1.0 to Travis CI mix.
Move rubinius dependencies from gemspec to Gemfile.
Change plugin to extension.
Implement callback modes for #each_statement and #each_triple.
Update reader spec for new rdf-spec reader tests.
Version 1.1.0.1.
Finish 1.1.0.1, Implement callback modes for #each_statement and #each_triple.