Fixed UB code

UA:
-Kills along a coastline no longer yield Faith
+All Great People except Generals and Admirals may now build coastal Holy Sites
+Coastal Holy Sites now yield Faith based on the surrounding Land tiles
~Moved Holy Site construction button to Improvements tab

UU:
-No longer heals when on a Trade Route

UB:
~Yields Culture from incoming Naval Trade Routes (was International Trade Routes)
+ No longer requires Shrine (now only Monument)

Updated Civilization Icon
Updated and expanded City list
May now build Holy Sites over existing Improvements
May not build Holy Sites on Atolls

+fixed AI Holy Site construction

+Fixed bug where all units could build Holy Sites