[Proposal ] Make node async environment to allow remote !text loading.

I found myself in a situation, when some of the files used in the app should be generated by the server. Template files to be exact. I've got bunch of `text!` calls in the main.js file that are being used to load dozen webpages containing raw template files which are later added to the built file during build process. Problem is, since those files are generated by the back-end and node is used to grab them, whole process fails because node is set to be synchronous environment that won't wait for the remote file to be generated and loaded.

Network-loaded scripts are being skipped as expected.