-- Roughly double the cost of shields/armour
UPDATE hardware_type SET cost = 250 WHERE hardware_name = 'Shields';
UPDATE hardware_type SET cost = 150 WHERE hardware_name = 'Armor';

-- Use British English spelling of armour for consistency
UPDATE hardware_type SET hardware_name = 'Armour' where hardware_name = 'Armor';

Increase the cost of shields/armour from 150/75 to 250/150
Increase the cost of shields/armour from 150/75 to 250/150

This change is made to help balance certain combat dynamics.

* Reduces the profits from port raiding (which were too high).

* Makes clearing forces slightly more expensive, since there was
  a large imbalance between the cost of laying and clearing forces.
  (It is still much more expensive to lay a minefield, as it should
  be due to the defensive advantage it provides.)

To help compensate the increased cost of combat, trade profit will
be slightly increased and more experience will be earned from battle.
(These will be added in separate commits.)
