hippo:user firstname, lastname, email etc. belong in cms namespace

In repository.cnd:

[hippo:user] > nt:base

• hippo:password (string) mandatory
• hippo:active (boolean) = true mandatory autocreated
• hippo:firstname (string)
• hippo:lastname (string)
• hippo:email (string)
  + * (hippo:listing) = hippo:listing
  + * (hippo:usersettings) = hippo:usersettings

Should be something like:

[hippo:user] > nt:base

• hippo:password (string) mandatory
• hippo:active (boolean) = true mandatory autocreated

[frontend:user] > hippo:user

• frontend:firstname (string)
• frontend:lastname (string)
• frontend:email (string)