This removes autogeneration of passwords for both < and >13
by setting passwordGenerated to false, and copying the >13
password form element stuff into the <13 signup page. If
we're really not going to auto-generate, a follow-up commit
can clean it all out.
Removing "Choose your own" button from password field for <13 signup
if passwordGenerated is true.
Merge pull request #588 from stenington/no-autogenerated-passwords

No autogenerated passwords