Added Dice roll mechanism
Implementing Coin system
Managed Coin system
Implemented Critical Hit class and weapon critical threat range system.
Imported JScience in mvn, using it for localization of measurement
units. I hope. Implemented generic Weapon typo.
Weapon implemented (I think). It should be done, but I'm not sure.
Weapon moved in its own package. Have to implement Armor and Shield. And
a system with which I can apply altered values in all the objects. Maybe
I have to use some reflection to accomplish this task.