Add arsentd_lev dataset
thanks ! can you also regenerate the dataset_infos.json file please ?
Add The Arabic Sentiment Twitter Dataset for Levantine dialect (ArSenTD-LEV)

Paper: [ArSentD-LEV: A Multi-Topic Corpus for Target-based Sentiment Analysis in Arabic Levantine Tweets](https://arxiv.org/abs/1906.01830)
Homepage: http://oma-project.com/