Add the script to check the expiration date of the domain.

This commit refs #93.
Install whois command.

Domain-expiration check script use the whois command,
so install the whois command in advance.

This commit refs #93.
Deploy the domain-expiration check script to /usr/local/bin.

This commit fixes #93.
Merge branch 'id/93' into dev
Merge commit '230262e24a7e2b0c9f6a9c0650ff526c627f21fb' into HEAD