[fixed] Ship shield component strings
[fixed] Ship shield stat precision and recharge values
[fixed] Ship shield components now unable to be made in a factory
(subcomponents still can)
[fixed] Mark IV shield is now craftable with stats and accepts shield
subcomponents
[fixed] Mark III shield resources

Change-Id: Ifc9a31fbc650d1abadf2a44bad4cb08527249a08