[2977] Implement basic script for Yogg Saron - phase 1
[2978] Add spawn support for Ulduar keepers for Yogg-Saron encounter

Thanks to @evil-at-wow for providing the necessary data
[2979] Fix Ame01 aggro texts

Close #71
[2980] Implement script support for quest 12981

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

Also remove forgotten scriptname from [2973]

Close #83
[2982] Implement script support for quest 11590.

Close #75