Kodi support is nearing completion

It’s 2020 and we’re back on extending Rigelian with support for Kodi. Added recently are the ‘play random album’ and ‘play random songs’ functions. Turns out that adding 100 songs in one command is very slow on Kodi, so I had to limit that to 20 songs to keep the performance acceptable. Also the sortation of albums in various screens is completed. Remaining now is the ability to play radio stations, and creating a player setting screen and then we’re good to go.