Add erltrek_dock.erl

* Add dock/undock functions
Update erltrek_terminal.erl

* Add dock/undock related message processing
Update e.erl

* Add d() and u() for dock and undock
Update erltrek_dock.erl

* Fix typo from nofify -> notify
Update erltrek_event.erl

* Add dock and undock handling to enterprise_command/1
Update erltrek_event.erl

* Add dock and undock to commands/1
Update erltrek_dock.erl

* Add replenishing energy/sheild when docked in try_docking/1
Update erltrek_klingon.erl

* Add starbase protection to perform_attack/3
Update erltrek_move.erl

* Add prohibiting moving when docked to impulse/5
Update erltrek_terminal.erl

* Add {move,docked} and {hit, protected_by_starbase} to handle_event/2
Update src/erltrek_phaser.erl

* Add prohibiting firing when docked in fire_phaser/4
* Change message event to use {phaser, _} when unable to fire
Update erltrek_terminal.erl

* Change phaser-related events to use {phaser, _} in handle_event/2