Cordova new url

Wrong link. It says "codova.io" which doesn't exist.
Merge pull request #143 from warriorkitty/patch-1

Fix typo in corodva url
Fixed bug in phonegap-nfc.js with missing callback parameter in removeNdefListener().
Merge branch 'master' of https://github.com/don/phonegap-nfc
Merge pull request #149 from jakobwitte/patch-1

re-add callback parameter to remove ndef listener
re-add callbacks for remove methods. Fixes #148