Feature: pass 'resolve' option to browserify

Pass `resolve` option value along with `noParse` and `extensions`.
This allows to specify custom module resolution function.
See: http://git.io/VuxXdg (node-browserify readme).

Add test to: `test/main.js`.
Test uses fixture: `test/fixtures/custom_resolved.js`.

Document this feature in `README.md`.

Btw, thanks for this awesome package, @deepak1556!