Introduce WrapBusinessError interceptor binding

[mkouba]

• resolves Provide an API to turn any exception thrown in a feature method into a business logic error #98

[mkouba]

@maxandersen FYI @WrapBusinessError can be declared on a method or on a class. And it wraps all exceptions by default. I'm not so sure about the name but did not find anything better.

[maxandersen]

How about @WrapOnException ? wether its business or internal is separate concern i feel?

[mkouba]

How about @WrapOnException ? wether its business or internal is separate concern i feel?

Hm, I don't like that. The point is to wrap an exception if it represents a business error. If it doesn't then we don't wrap but log an exception and reply "internal error" to the client.