[Grok-dev] LoginDemo and PlainLoginDemo

[Luciano Ramalho]

Today I removed everything related to annotations from the LoginDemo
and created PlainLoginDemo:

http://svn.zope.org/grokapps/PlainLoginDemo/

Removing the email field resulted in a reduction of more than 100
lines of code, because then I did not need to define an interface but
used the predefined IInternalPrincipal interface; email validation and
the UserData adapter also became unnecessary.

I also added docstrings and comments.

I will continue to work on both LoginDemo and PlainLogin demo over the
next few days.

Regards,

Luciano