Trade Office fix

Recent global change to the caravan figures nerfed the Dutch UB to be
just another caravansary. This makes a 100% increase to the different
values of each type of "caravansary" building.
Trade Office fix #2

Adjusted the actual defining code to show the desired 50% increase over
the vanilla
Removed CityDefense

Removed CityDefense from AI handicap. Caused too many one-shot kills.
Wonder descriptions

Just to update them until the tooltip writer takes over
GP yield modifiers compatibility with CSD

BUILDING_JADE_HALL now gives Science and BUILDING_HAGIA_SOPHIA Faith if
USING_CSD=1
Feature tweaks

Reefs & isles are now -10 to defense (limited manoeuvrability)
both are +2 Movement and isles can now be seen over (the landmasses next
to them are higher and can be seen over).
Update Changelog.md

misplaced 'e'
Philantropy policy changes if CSD is active

-Moved effects to sql with check for USING_CSD
-New effect if USING_CSD is active: +1 happiness from
BUILDINGCLASS_SCRIBE and no influence from gold gifts
-Text in CSD.sql works now
Philantropy policy changes if CSD is active v2

-Moved CEP effects back to CEP_Patronage.xml