added support for typeable URL in consent form (closes #29)

Removed password from the old consent URL (giving consent does not require password).
Also shortened the URL for the typeable version. This will be backward-compatible with the old clients (both URLs work). This will close #29.
@ben-jones, can you please review this?
I'm guessing you had this in for testing and didn't mean to commit it, but if this is supposed to be here, then you should use logging instead of a print statement.