Update README.md

Author: carbonwallet

README.md

@@ -22,4 +22,8 @@ without having to go through the Chrome Web store:
 - Make sure "Developer mode" is checked at the top
 - Click "Load unpacked extension"
 - Navigate to the carbonwallet.github.io directory and click OK
-- Carbon Wallet will now appear as an option in your App list in Chrome
+- Carbon Wallet will now appear as an option in your App list in Chrome
+
+### Licence
+
+http://opensource.org/licenses/CDDL-1.0