Update to 1.3.7

Added more options to number and duration options
Added Spotify Web Player URL option
Merge branch 'master' of https://github.com/miigwall/Spotify-Playlist-To-Text

Conflicts:
	playlisttotext/css/playlisttotext.css
	playlisttotext/index.html
	playlisttotext/js/playlistToText.js
	playlisttotext/manifest.json