Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
Tweet: IDC predicts that by 2020 the term cloud will no longer be used...'\n\nIT Managers and Administrators everywhere will rejoice.
This tweet contains emotions: 
joy, optimism