[sd2_mr0643] Fix "Eye of Acherus", related to issue https://github.com/mangosR2/mangos/issues/1427

Need check on R2, I simple copy code from my SD2, where all works Ok.
[2980] Implement script support for quest 12981

Close #84
[2981] Implement script support for quest 12977.

Also remove forgotten scriptname from [2973]

Close #83
[sd2_mr0644] Cleanup
[2983] Fix compile for CMaNGOS 12587

Thanks to dbauz for pointing. Requires CMaNGOS [12587]

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>
[sd2_mr0645] Simplify and fix npc_valkyr_battle_maiden script
[sd2_mr0646] Added support for cast spells on Victim, AOE and all players on instance. Implement custom class for Instance Event handling.
[sd2_mr0647] Alternative Power support. (Used in instances like End of Time).
Merge branch 'master' of git://github.com/mangosR2/scriptdev2