Thowing weapon  creature_item_template corrections

These scripts place the correct values in the fields for the Throwing
Weapon items in the creature_item_template table.
The invalid entries were in the following fields:
class, which was set to Miscellaneous, when it should be Weapon
subclass, which was set to Consumable, when it should be Thrown
material, which was not set to Metal in a few cases
inventory_type, which was set to not equipable, when it should be Thrown
Merge pull request #168 from Chuck5ta/Rel20

Thowing weapon  creature_item_template corrections