Added an email field to SignupCode for sending a code to a specific person.
Added an email field to SignupCode for sending a code to a specific person.

git-svn-id: 51ba99f60490c2ee9ba726ccda75a38950f5105d@1581 45601e1e-1555-4799-bd40-45c8c71eef50

alex/pinax,alex/pinax,alex/pinax,amarandon/pinax,amarandon/pinax,amarandon/pinax,amarandon/pinax