Scripts/Ulduar/Flame Leviathan: Fix Pursue spell (target selection/filtering, emote, and aggro), and clean up some atrocities in the script.

sql/updates/world/2011_09_26_00_world_spell_script_names.sql

@@ -0,0 +1,4 @@
+DELETE FROM `spell_script_names` WHERE `spell_id` IN (62374,62475);
+INSERT INTO `spell_script_names` (`spell_id`,`ScriptName`) VALUES 
+(62374,'spell_pursue'),
+(62475,'spell_systems_shutdown');