Drop outdated temporary SQL queries.
[sd2_mr0595] Improvement (ICC\Blood-Queen Lana'thel)
[sd2_mr0596] Improvement (ICC\Valithria Dreamwalker)
[sd2_mr0597] Improvement (ICC\Valithria Dreamwalker)
[sd2_mr0598] Safer compare.
[sd2_mr0599] Added Placeholder for Halls of Origination instance.
[sd2_mr0600] Added missing bosses of end of time instance.
[2914] Add friendly game support for Chess event

Thanks to evil@wow for providing the necessary data
[2915] Add script support for quest 660

Thanks to grz3s for providing the necessary data
[2916] Implement escort quests 1222 1270

Waypoints and texts are taken from ytdb. Thanks to them for initial problem research.
Note: Be sure to remove dbscripts_on_quest_start for these quests, otherwise you might get unexpected behaviour

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>
[sd2_mr0601] ome Ulduar AI fixes
[sd2_mr0602] Improvement (ICC\Sindragosa)
[sd2_mr0603] Update some define names.
[sd2_mr0604] Use override keyword for override methods.
[sd2_mr0605] Restore some missing SQL files from SD2.
[sd2_mr0606] Restore main SD2 (Xfurry) version of "Pit of Saron" instance from testing branch and fixed to fit CMangos [12514]. Possible SQL corrections needed but seems to works fine.