Modify gitignore

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Remove gitignore
Add Chapter1

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Add C1/6

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