Renamed "BOOTP Message" to "DHCPv4 Message" option.
Removed spurious whitespaces from the xml.
Updated year in date tag.
Resolve issue #14, use DHCPv4 over DHCPv6 instead of DHP 4o6.
Address issue #15, move the sentence about not requesting Server Address.
Addressed issue #13, RFC6842 must be implemented by the server.
Addressed issue #16, updated IANA Considerations with new options and messages.
Regenerated text version of the document.