Make create_library work with Distributed

[KristofferC]

In order to use Distributed, the Julia session needs to start new Julia processes with some "special properties". Those Julia processes also need access to the Project.toml file so they can look up the UUID for packages that they are going to load in their session.

This is now fixed for create_app in #572 by bundling the Julia executable that comes with the Julia installation and also bundling the Project.toml that is used for the app. Something similar needs to be done for create_library.

Any thoughts @kmsquire?