Support for Sukritact's City Info Stack mod

• Added support for Cultural Diversity, P&P, Unique Cultural Influences, and Civ IV Traits
  
• Reduced the reward from the Assemble the Althing decision
  
• Misc tidying
  
• Added missing strategic view and unit flag for the Skald
  
• Fixed spelling of Reykjavik, and various other city names
  
• Added higher resolution Great Work of Art slot icon
  
• Skald now has double movement when embarked
  
• Great Writer points from the UA now go to the capital only if no other city has the Writer's Guild (as recommended by Sukritact)
  
• Fixed an issue with the religious hermit event where you could not choose to adopt the hermit's religion as your own
  
• Fixed an issue where you would receive a free policy with the Landnamabok decision
  
• Cities founded with a Skald now give that city a free Great Work of Writing slot, instead of cities found on a different continent type. Terrain difference still applies.