Support ripper-tags format about guard-ctags-bundler

[ivalkeen]

This already can be achieved using binary option and hooks:

guard 'ctags-bundler', src_path: ["app", "lib", "spec/support"], binary: 'ripper-tags',
  arguments: '-R --force --tag-relative', project_file: 'tmp/tags', bundler_tags_file: 'tmp/gems.tags', stdlib_file: 'tmp/stdlib.tags' do

  watch /\A(app|lib|spec\/support)\/.+\.rb\Z/
  watch('Gemfile.lock')

  callback(:run_on_changes_end) { `sed -i '' 's#$#    language:Ruby#g' tmp/tags` }
  callback(:start_end)          { `sed -i '' 's#$#    language:Ruby#g' tmp/tags` }
end