refactor: removing dependency on MagicFrame from DuelPanel.
re-ordered layout of hand, graveyard and exile tab buttons to be more consistent and thus clearer.
added comments explaining use of "testGame" and "selfMode" VM arguments.
moved duel.txt and duel.cfg into new "duels" directory with a view to allowing multiple duels to be saved in future.
Merge main repo
update contributors for 1.45