Support using .min.js files

Some libraries cannot be minified without breaking the code or undoing optimizations. Popular ones include angularjs and lodash.

Cassette should allow to use .min.js files when available.

An easy solution would be to support this at least when passing an array of strings to the bundle, where we specify the files to be added manually. If the file ends with .min.js, just skip minification.

This would allow us to create extension methods that filter the require files ourselves and wouldn't change existing behavior.