Further localization bugfixes.

Minor bugfixes:
1. Localization for Theatre Sq. adjacency.
2. Added missing textures for WQ.

Fixed artdef dep for animated time of day, etc.

1. Tidy up Civpedia descriptions
2. +3 tourism from Walled Quarter with Conservation.

Added Keep.

Hotfix: dlc load order

Hospitals provide immunity from minor disasters.

1. Zombie Outbreak spy mission is in the Walled Quarter (instead of City Centre).
2. Mass Grave unlocks advanced project Turn Undead II.

Added Hospital building.