Add image authors
Separate bgm/se volume, VolumeTuner rework.
Cards/Characters Voice: Thanks to VV, shourei小N, 大白, 君寻, 小羽
Yuuka: wrap Damage in Action.

* Or other Action will be confused about action_stack.
incr ver, welcome msg.
Prompt when performing time-consuming tasks.
Auto suppress se.
ScarletRhapsody: Accept of launching all hand cards.
Ran: Do not process action if no card selected for dropping.
Skills has 'drop' usage should drop cards before it has been activated.
incr ver, welcome msg.