Feature (index.js): 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

Btw, thanks for this awesome package, @deepak1556!