Minor Typo Fix

The tooltip for the Wealth finisher said "Smithy" instead of "Smith"
Commerce Opener nerfed

Lowered the gold and production from the commerce opener from 15% to 10%
Entrepreneurship (Wealth) policy added Great Merchant

Added a free Great Merchant to the Entrepreneurship policy in addition
to +25% great merchant rate and double gold from trade missions.  The
policy was pretty weak before.
Protectionism (Wealth) policy nerfed

Removed the extra 10% gold and production from the Protectionism policy.
Retains +1 production for mines and lumbermills in addition to +1 gold
for villages.  This policy is very strong in that the extra gold and
production on the improvements is multiplied by other factors, such as
buildings like the Market, Bank, Smith, Workshop, Factory, etc.  I've
been playing with this setting for a while and it's quite balanced with
the other policies in the tree.
Maritime Infrastructure (Wealth) buff

Added Harbors to give +2 gold along with Seaports and Lighthouses.  The
policy already gave +3 production per coastal city even though the text
said +2, so I just changed the text to reflect the reality of what the
policy is doing.