requirementsascode v0.2.2

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
• Specify cross-cutting concerns, e.g. measuring performance.

Limitations include:

• No support for included use cases or subflows so far

What's new:

• Better exception handling - throw UnhandledException when unhandled exception occurs
• New method canReactTo in UseCaseRunner to check if it reacts to certain type of event
• Shopping app adapted to enable/disable Buy Button based on whether UseCaseRunner reacts to buy event