Small fixups.
Extended Dealer - somewhat trivial implementation.

Includes:

* Dealer-as-a-player strategy
* Implementation of interface extensions, such as deal()
* Small fixes and includes.
Small extension to Player interface - player stand + score notification.
Small extension to Player interface - player stand + score notification.
Extended Dealer - somewhat trivial implementation.

Includes:

* Dealer-as-a-player strategy
* Implementation of interface extensions, such as deal()
* Small fixes and includes.
Merge branch 'rebasin' into lyc