-Added clauses to the define-handler mini-language for lists of elements
-Added handlers for merging cards/stacks into a stack
-Fixed a couple of bugs relating to card-count for stacks and insertion into hand
-Defined separate move! method. The naming may be a bit confusing, because we have a handler named `play/move` which handles spatial movement. This method moves cards between containers.
-Fixed bug related to draw handler
-Added options to $draggable
-Defined $right-click
-Cosmetic changes
-Changed existing $context-menu call to $right-click