Adding initial support for registries as libraries

Rudimentary parsing of source paths from the sdk

You can add a library to a project by clicking Cmd-; (that's Project Structure from right clicking on the top-level entry in the Project view).

Select the Libraries entry on the left, then the + at the top. From that dialog, you choose a registry file.

This is not complete - it needs a ListModel class and renderer so the list of detected source roots looks better, and it needs to parse the lid files from the source registry.