Fixed compatibility with the latest Lichess.org update. The extension has been updated to work with the new page structure and element names

- Fixed sound not working
- Made the options page as the default popup instead of the soundboard page.

Version 0.5
- Added the voices of two new commentators: GM Yasser Seirawan and NM John Chernoff
- Options page no longer requires users to refresh the lichess page for preferences to be applied
- Options page now saves automatically without requiring to press the save button
- Style tweaks to options and soundboard pages

- Fixed problem where audio would get played over long sounds already playing