Fixed firefox nightly link

Fix for #84

Fixed:
- Android next song not playing issues. This was due to exceptions being
thrown and not caught when attempting to access browser.commands. It is
fully unsupported
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/commands/getAll
- Some issues with the PowerShell build script

Merge pull request #83 from pvrs12/82_firefox_android_audio

Changed audio format for android

Merge pull request #75 from pvrs12/74_mediasession

Initial implementation of mediaSession API

Version bump

Merge pull request #79 from pvrs12/77_76_fixes

77 76 fixes

Fixing arrows again. My fault this time

Version bump

Fix #67, #68, #71 (hopefully) (#72)

* + unpacked.bat
makes an unpacked folder for chrome devving

* - Added permissions to change user-agent

* switch to fetch (async; avoid hangs)

* async

* 🦀 jquery is gone from the new player 🦀

* jquery is fully gone + nicer scrollbars

* don't throw error in sendRequest

* wipe trackers + theming fix

* fix oldpopup compatability with bg.js

* remove unused icons

* fixed options page

* typo

67 api issues (#70)

* Changed User-Agent header

* Bumped version of manifests