fix workflow

doc/workflow.md

@@ -0,0 +1,25 @@
+# Workflow
+
+@startuml
+
+state c <<choice>>
+state haswon <<choice>>
+state MarkPoints #lightblue
+state MarkAdvPoints #lightblue
+note right of MarkPoints : automatic 'Mark' transition\nwhen no school
+note right of MarkAdvPoints : automatic 'Mark' transition\nwhen no school
+
+[*] -> RollDice : BeginGame
+RollDice --> RollWaiting : Roll (current player)
+RollWaiting --> MarkPoints : RollResult (engine)
+MarkPoints --> c : Mark (current player)
+c --> HoldHorGoChoice : [new hole]
+c --> [*] : [has won]
+c --> Move : [not new hole]
+HoldHorGoChoice --> RollDice : Go
+HoldHorGoChoice --> MarkAdvPoints : Move
+Move --> MarkAdvPoints : Move
+MarkAdvPoints --> haswon : Mark (adversary)
+haswon --> RollDice : [has not won]
+haswon --> [*] : [has won]
+@enduml