Add .gitignore: Ignore ConfigFiles/git/{tmux-powerline, oh-my-zsh}

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Rename ConfigFiles to Config
Rename ExerciseFiles to Exercise

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Modify

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>