SpotifyAPI Web API 3.0.2

3.0.0 changes:

• .net standard support
• Seperated NuGet Packages for Core Client and Auth flows:
  • SpotifyAPI.Web - The API Client
  • SpotifyAPI.Web.Auth - The Auth flows
• Auth flows now use a really good webserver called embedio, no hacky internal solution
• Auth flows now can serve HTML/static files, so we could build a really good user experience
• Auth flows have a cleaner API and should be more stable
• Docs are not updated yet. But the API is very similar to the old one.

3.0.2 changes:

• .net standard and .net 46 should be running smooth now. 404 error fixed.