Translate "Manpages" menu/title of cgmanager into Japanese

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Add the Japanese introduction page for the cgmanager

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Merge pull request #12 from tenforward/japanese

Add Japanese menu and title for the manpages and introduction page for the cgmanager