Knockout es5 is AMD aware.

In the context of AMD, knockout defines itself as a module and does not attach 'ko' to the global object. This causes es5 to fail.

This change defines an AMD module for es5. Knockout is declared as a dependency to ensure that it loaded first.
Thank you, if you find any errors, feel free to create a new issue. 

Here you can watch the latest release https://github.com/SteveSanderson/knockout-es5/releases