Add Japanese translations for the lxc download page

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

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

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
unify expressions in Japanese pages

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Merge pull request #5 from tenforward/japanese

Add Japanese translations for the downloads page