Cakefile cleanups

* Don’t error out if `.shim.js` doesn’t exist
* Also clean up `.shim.js`
Bump coffee-script version
Add options hash support for render

* Allow an options hash to be passed to the `render` call (defaults to
`{}`)
* Fixes #154
Rebuild

* Changes to phantom.js are due to fixes in `coffee-script`
* Browserify is adding the `url` module to this build, probably due to
a different dependency bump.
* Some of the new API mappings had apparently never been included in
builds.
Merge pull request #157 from loginx/fix-render-shim

Add option hash support to render shim