added a tracking script
added a tracking script

jmrozanec/tweet-emotion,BPJackson/tweet-emotion,pubnub/tweet-emotion,shannonforsman/tweet-emotion,BPJackson/tweet-emotion,wcjohnson11/tweet-emotion,ellisonleao/brazil-tweet-emotion,wcjohnson11/tweet-emotion,jmrozanec/tweet-emotion,pubnub/tweet-emotion,shannonforsman/tweet-emotion