issue 135 solved

135) friends find email notification for non FB accounts
     must read email from one or more non FB API's
     user accept before sending email notifications
     must have an unsubscribe link in email
     ip adr and account(s) info in friends suggestions mail so that receiver can se info about creator of friends suggestion
     use fb notification is fb is one of the shared accounts
     only use email address is fb is not one of the shared accounts
     only display email in accept box if fb ia not one of the shared accounts
     two unsubscribe links:
     1) unsubscribe all mails from Gofreerev
     2) unsubscribe mails from Gofreerev users
     unsubscribe count for Gofreerev accounts. Disable friends notifications if unsubscribe count > 2
     remember send email notification in notifications with internal = 'N'
     information about send email notifications is used in unsubscribe
     unsubscribe: verify that email has been send, noti_id + password, information about "sender" of email
     do not show external notifications in inbox
     different cleanup (delete old notifications) for internal and for external notifications