ShadowDancer3 - Auto weapon swap

2009.08.04 1. This version has changed the save-version, so it'll clear the prev version's settings.

2. Add new swap time: Skill Cooldown Start, Skill Cooldown End, Gain Buff, Lost Buff.

3. In the before version, when the skill and swap time is right, you can only swap the weapon. Now, there is two type to select. One is "Swap", just like before. The other one is "Set", it can change one weapon-set to another, or just set one weapon-set to empty(so when gain "shadowdance" buff, set notdagger to empty, after ambush it won't change weapon to non-dagger weapon now, and when lost "shadowdance" buff, just set notdagger back, see what I do in pics).