Browserifiable version of radiotag.js.
Merge pull request #2 from oncletom/browserify

Browserifiable version of radiotag.js
Add Thomas Parisot to Contributors list
Use browserify to produce AMD-compatible build for use in browser
Tag in node.js and the browser

Uses node.js versions of DOM and HTTP libraries and uses browserify
to swap in browser-specific version of DOM and HTTP modules
Merge branch 'browser-and-node' of https://github.com/radiodan/radiotag.js into browser-and-node
Browser/node.js parity

- Normalise HTTP requests by creating wrapper for node and jQuery
- Fixes getAuthServer bug in node.js implementation
- Consistent error states in browser and node.js