capitalize the words in the type line
removed 'symbol's dependency on on 'core' as it's not in use
added Card.isFused() and implemented it
added a note about revising the 'over' artwork's render specs
added a test dependency on the 'symbols' module to ease building bodies for testing validation
allow one-shot overrides of the active prop when adding a message via the helpers
fixed toString to spit out an literal symbol group, instead of the List-style psuedo-array notation
changed Card.castingCost to be type SymbolGroup instead of just List<Symbol>.  unclear why it was that way to begin with
finished implementing the card validator tests, and got most of the card validator itself working as well