Update README.md

Added read receipts to the list of upcoming features, and fixed brackets on email address example.

README.md

@@ -10,9 +10,10 @@ The ```email``` package is designed to be simple to use, but flexible enough so
 
 Plans for the ```email``` package currently include supporting:
 *  From, To, Bcc, Cc fields
-*  Email addresses in both "test@example.com" and "First Last <test@example.com>" format
+*  Email addresses in both "test@example.com" and "First Last &lt;test@example.com&gt;" format
 *  Text and Html Message Body
 *  Attachments
+*  Read Receipts
 *  Custom headers
 *  More to come!