Added javadoc for ClassManager#ClassManager(int)
Added javadoc for ClassManager#ClassManager(int,int)
Added javadoc for ClassManager#getAvailableClasses()
Added javadoc for ClassManager#getAssignedClasses()
Added javadoc for ClassManager#getAssignedClass(HumanEntity)
Added javadoc for ClassManager#assignClass(HumanEntity,CharacterClass)
Added javadoc for ClassManager#unassignClass(HumanEntity)
Added javadoc for CharacterClass
Added javadoc for CharacterClass#getName()
Added javadoc for CharacterClass#getIcon()
Added javadoc for CharacterClass#getInventoryContents()
Added javadoc for ClassChangeEvent
Added javadoc for ClassChangeEvent#getWho()
Added javadoc for ClassChangeEvent#getNewClass()
Added javadoc for ClassChangeEvent#setNewClass(CharacterClass)