Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
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