update plugins to reflect 6to5 org migrations

doc/plugins.md

@@ -4,20 +4,24 @@
 
  - [Broccoli](https://github.com/very-geek/broccoli-6to5-transpiler)
  - [Browserify](https://github.com/6to5/6to5-browserify)
- - [Brunch](https://github.com/es128/6to5-brunch)
+ - [Brunch](https://github.com/6to5/6to5-brunch)
  - [Duo](https://github.com/bdo-labs/duo6to5)
  - [Connect](https://github.com/6to5/6to5-connect)
  - [Gobble](https://github.com/6to5/gobble-6to5)
- - [Gulp](https://github.com/sindresorhus/gulp-6to5)
+ - [Gulp](https://github.com/6to5/gulp-6to5)
- - [Grunt](https://github.com/sindresorhus/grunt-6to5)
+ - [Grunt](https://github.com/6to5/grunt-6to5)
  - [Jade](https://github.com/Apoxx/jade-6to5)
  - [Jest](https://github.com/6to5/6to5-jest)
- - [Karma](https://github.com/shuhei/karma-6to5-preprocessor)
+ - [Karma](https://github.com/6to5/karma-6to5-preprocessor)
  - [Mocha](https://github.com/6to5/6to5-mocha)
- - [Rails](https://github.com/josh/sprockets-es6) or via [browserify-rails](https://github.com/6to5/6to5-rails)
+ - [Sprockets](https://github.com/josh/sprockets-es6) or via [Browserify](https://github.com/6to5/6to5-rails)
  - [webpack](https://github.com/6to5/6to5-loader)
 
 ## Integrations
 
  - [Isparta](https://github.com/douglasduteil/isparta) - Code coverage with `karma` and `instanbul` using 6to5
  - [JSXHint](https://github.com/STRML/JSXHint) - A wrapper around JSHint to allow linting of JSX files
+
+## Bridges
+
+ - [Ruby](https://github.com/6to5/6to5-ruby)