requirementsascode v0.4.0

Pre-release of requirementsascode, with the following features:

• Document a use case model, actors, use cases, use case flows, use case steps, events
• Run the use case model for a particular actor
• Extract the use case models, and generate documentation from it
• Specify cross-cutting concerns, e.g. measuring performance.

Limitations include:

• No support for included use cases or subflows so far

What's new:

• requirementsascodeextract subproject for document generation
• New Builder API that clearly separates the model from model building. This makes model processing later on easier.