Add Json output option to showing a topic
Add Json output option to showing a topic

The json object returned has the keys
`real`: _Content of the real tweet_
`fake`: _Content of the fake tweet_
`real_handle`: _Handle of user who created the real tweet_
`fake_handle`: _Handle of user who created the fake tweet_
`tweet_topic`: _Topic of the tweets sent_
`topic`: topic the user had selected_

tweet-squared/Tweets-Squared-App,tweet-squared/Tweets-Squared-App,tweet-squared/Tweets-Squared-App