Please add an example of having the RequireJs config outside of the main.js

[aligneddev]

Please add an example with a config.js file that has the RequireJs configuration. I spent some time, but haven't figured it out yet.
The same problem is stated here: http://stackoverflow.com/questions/28874003/building-durandaljs-with-gulp-fails-for-external-modules.

I think that external from the main.js configuration should be supported.