In Electron apps, the cost of large modules is very real.
fs-extra is very convenient, but removing it caused 50 fewer unique
files to be required(), resultin in 60ms faster startup!
Before: 557 unique requires (1330-1340ms)
After: 507 unique requires (1270-1280ms)
* Open multi-file torrents as playlists
* Add `repeat` and `shuffle` options to the player
* Autoplay first file in torrent
* replaces `pickFileToPlay` feature
* when reopening player, restores the most recently viewed file
* Add playlist navigation buttons to Windows thumbar
* Remove `repeat` and `shuffle` options
This reverts commit 9284122461.
* Play files in order they appear in torrent
* Clean up playlists code
