feat: add undocumented options of send

* Update send-helper.md

This fixes #33

* Update send-helper.md

I made the correction you requested and also added another value to send, I just made use of it.

docs/mail/send-helper.md

@@ -59,6 +59,22 @@ The name of the primary recipient
 sails.helpers.mail.send.with({ toName: 'Jack Sparrow' })
 ```
 
+## cc
+
+The email addresses to send a carbon copy of the mail to.
+
+```js
+sails.helpers.mail.send.with({ cc: ['jack@blackpearl.com'] })
+```
+
+## bcc
+
+The email addresses to send a blind carbon copy of the mail to.
+
+```js
+sails.helpers.mail.send.with({ cc: ['jack@blackpearl.com'] })
+```
+
 ## subject
 
 The subject of the email.