DB/Creature: Summoning the Princess

By dr-j, closes #12370
DB/Gameobject: Deeprun Chest

Closes #12430
DB/Quest: Let Them Not Rise

By dr-j, closes #12484
DB/Quest: Investigate the Alchemist Shop

Original work by Rushor, finished by dr-j, closes #9717
Core/InstanceScript: Fix possible crash

Store Boss doors/minions as GUID instead of GameObject*/Creature* to avoid accessing pointers to free'd memory.
DB/Misc: Update to badac94

By dr-j
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore
Merge pull request #24 from amsjunior1/master

pull