Add initial state to Bootrstrapper invocation

[zsoltk]

We need to decide what to do in Bootstrapper based in the initial state quite often. Right now this needs to be passed manually to implementation constructor, which is quite inconvenient when e.g deciding the initial state based on TimeCapsule, as a reference cannot be stored for it inside constructor.

Proposed solution is to change Bootstrapper and BaseFeature so that initial state is passed automatically to invocation.