Various tunes and bug fixes.

* DeathHandler refactoring.
* Free attack mechanism refactoring.
* Cooperation can't select self now.
* Kogasa Jolly ui tune.
* Flandre & ElementalReactor bugs.
* Yuuka & Duel & Exinwan bug.
Various tunes.

* Minor bug fixes.
* Action class hierarchy tune.
* Free attack mechanism reworked.
* Yuuka & Exinwan & Duel bug fix.