• Update workflow and logic for options storage
• Update keep alive logic for aria2RPCRequest
  • Fixed a bug that keep alive only works when request success.
    this avoid that once aria2c.exe is terminated, the background
    and popup will be stopped, untill you restart the extension
• Use asychronous functions as possible
• Check urls' protocol for http, https, ftp, and magnet before sending requests on newTaskWindow
• Some code clean up