added constructors and get character method to Party.java
added get value method into Attribute.java
added get attirbute value method to Character.java
added set value method to Attribute.java
added AttributeName.java
changed attribute name from string to AttributeName enum
added changeAttributeValue method to Character.java
Change setValue method in Attribute.java to changeValue to keep the name in line with what the method does
Changed getById methods to getCharacter and getLevel methods to getAttributeValue to integrate it into what is in the Character class
Updated Reward.java