add emoji usage to markdown cheatsheet

TT-- · TT-- · commit f168b1efe02e · 2017-08-24T11:31:37.000-04:00
diff --git a/README.md b/README.md
@@ -182,3 +182,8 @@ Hotkey list:
 | Left | ← |
 | Right | → |
 
+Emoji:
+
+:exclamation: Use emoji icons to enhance text. :+1:  Look up emoji codes at [emoji-cheat-sheet.com](http://emoji-cheat-sheet.com/)
+
+    Markup : Code appears between colons :EMOJICODE:
