update version of builtins in deps

Get the fix they did to include the "constants" builtin module.
Add JSON support for require statments.
add __dirname support
Merge branch 'JSON-Support'

Conflicts:
	lib/bundle.js
Update README.md

update the readme to explain how to workaround the limitations (not supporting dynamic require statements and lack of native module support the pseudo support of __dirname)
It actually makes way more sense for __driname to be exectuable dir rather
than the cwd.
clarify workaround for native module support
Merge pull request #88 from LorenzGardner/master

Add support for JSON files, and __dirname