Add SDS390 datasets to master Google Sheet

[rudeboybert]

Add following datasets to Master Google Sheet. The contents of this Google Sheet ultimately get fed into this webpage listing all datasets via pkgdown's compilation of vignettes/fivethirtyeight.Rmd.

• [x] By Natalia Iannucci: media_mentions_cable, media_mentions_online
• [x] By Marium Tapal: state_index, state_words
• [x] By Lizette Carpenter: cabinet_turnover
• [x] By Irene Ryan: castle_solutions, castle_solutions_2, castle_solutions_3
• [x] By Alina Barylsky: dem_candidates
• [x] By Rana Gahwagy:quasi_winshares
• [x] By Danica Miguel : raptor_by_player,raptor_by_team
• [x] By Sunni Raleigh: wwc_2019_forecasts, wwc_2019_matches
• [x] By Anna Ballou: foul_balls
• [x] By Jane Bang: nba_draymond
• [x] By Jordan Moody: fight_songs
• [x] By Kara Van Allen: nba_elo, nba_elo_latest
• [x] By Jessica Keast: nba_all_elo
• [x] By Fatima Keita: impeachment_polls

[mariumtapal]

@rudeboybert All done, except for Alina's dataset! There are two articles linked to this dataset with relevant entries in the google sheet highlighted in red.