Generate both app.js and app.min.js

[vladdu]

For use while developing.
Include the right version conditionally.

[madsem]

The .js version isn't even generated, am I right?
Running into this also this morning, and unsure what to do. Should I rewrite the gulp task and then send a pull request? Or is someone working on that already?

PS I'm just confused because the conditional include is already there in the default layout, but it seems the .js is not even generated by webpack/gulp.