Wonho

-   Skill.java and SkillMapper.java are added at 'skills'. SkillMapper
    is a core program helping to map each skill type with a key set
    respectfully. Constants representing numeric keys are added onto  
    the interface - 'skills/interfaces/CtrlKeyIndex.java'.

-   A log file - 'updates/updates_by_wono.log' is updated.