Update Character.java

added protected boolean isSpecialized,
altered spec() and norm() to make them fit for all subclasses
Update Warrior.java

removed subclass-specific spec() and norm()
Update Rogue.java

removed subclass-specific spec() and norm()
Update Character.java
Update Mage.java
Update Character.java
Update Mage.java
Merge pull request #2 from Joey--Zeng/master

asdf