Exposing browerify's `external` option
Add `transform` option to call browserify.transform()
Fix require option to have default empty [], not {}
Merge branch 'external' of https://github.com/ef4/broccoli-browserify
Merge branch 'add-transform-option' of https://github.com/greghuc/broccoli-browserify

Conflicts:
	README.md
	lib/index.js
Add `exclude` option to call browserify.exclude()