Script fixes and new effects.

Cleaned up unneeded requires in some scripts
Fixed Second Wind
Added new effect scripts
Added bard song scripts that mostly work

data/scripts/effects/hawks_eye.lua

@@ -4,6 +4,8 @@ require("modifiers");
 --The player in this capture was a Dragoon, so this is untraited. 
 --Traited Hawk's Eye says it increases Accuracy by 50%.
 --This could mean traited hawk's eye gives 28.125% (18.75% * 1.5) or it could mean it gives 68.75% (18.75% + 50%)
+--It's also possible that Hawk's Eye gives 15 + 15% accuracy untraited, which would give 450.85, which would be rounded down.
+--In that case, traited hawks eye could be 15 + 22.5% or 22.5 + 22.5% or (15 + 15%) * 1.5
 function onGain(target, effect)
     local accuracyMod = 0.1875;