Add Glob support for dictionary includes

[Lutzifer]

This change enables the use of Glob expressions (e.g. Sources/*/Package.yml) when including a yml file:

include:
  - path: Sources/*/Package.yml
  - path: Sources/*/Tests.yml
  - path: Sources/*/UITests.yml

[Lutzifer]

SpecLoadingTests

I implemented a very basic test for this

[Lutzifer]

@yonaskolb Anything I can do here?