Merge pull request #75 from wakameci/update-vmbuilder

update vmbuilder.
update baseurl handling.
Merge pull request #76 from wakameci/hold-baseurl

update baseurl handling.
add /var/lib/jenkins/.ssh/config.
update box list.
Merge pull request #77 from wakameci/ssh-config

add /var/lib/jenkins/.ssh/config.
Merge pull request #78 from wakameci/docs

update box list.
update baseurl.
Merge pull request #79 from wakameci/hold-baseurl

update baseurl.
update vmbuilder.