Added script for Refresh II.

Added scripts for Hunters Prelude and Archers Prelude.
The calculations were followed off Sword Madrigal and Blade Madrigal respectively.
Source for ranged accuracy caps:
http://wiki.bluegartr.com/bg/Hunter%27s_Prelude
http://wiki.bluegartr.com/bg/Archer%27s_Prelude

Sentinel's Scherzo calculation was incorrect.
Source: http://wiki.bluegartr.com/bg/Sentinel%27s_Scherzo

Changed Hunters Prelude and Archers Prelude AOE to 5 for use with Pianissimo.
Added animations for Sentinel's Scherzo and Refresh II.
Update sentinels_scherzo.lua
Update archers_prelude.lua

Forgot to change the calculation. 
Source: http://wiki.bluegartr.com/bg/Archer%27s_Prelude
Ranged Accuracy bonus caps at +40 before enhancement.
    This requires approximately 600 combined skill. 
So calculation was 300+300 = 600 - 200 = 400 / 10 = 40 cap.
Update hunters_prelude.lua

This is also assumed from Archer's Prelude that you need 600 combined skill to cap out at 30 ranged accuracy. 
300 + 300 = 600 - 300 = 300 / 10 = 30 ranged accuracy.
If this assumption is not acceptable then i'll remove the script entirely.
Merge pull request #201 from Shadowmh/master

Bard Songs