v4.4.1

Adds the following features to v4.0.0:

• adds window.script_location to loaded environment
• logs the error if json is not loaded properly to make debugging easier
• adds the .promise_all property to the clientside_require object to make it possible to determine when all loading has completed

v4.0.0

This release finalizes the separation between load and require, improving the readability of code written with the module and eliminating ambiguity.