Remove dj list and add function of starring playlists.

	modified:   lib/mplug163/menu.rb
Increase the limitation of fetching playlists in one take from 50 to 100.

	modified:   lib/mplug163/api.rb
Limit the length of playing song info.

	modified:   lib/mplug163/ui.rb
Correct code style.

	modified:   README.md
	modified:   lib/mplug163/api.rb
	modified:   lib/mplug163/menu.rb
	modified:   lib/mplug163/player.rb
	modified:   lib/mplug163/ui.rb
Now add support for starring albums besides songs and playlists.

	modified:   lib/mplug163/api.rb
	modified:   lib/mplug163/menu.rb
	modified:   lib/mplug163/ui.rb
Press l to play the highlighted song, press space to play or pause the present song.

	modified:   README.md
	modified:   lib/mplug163/menu.rb
	modified:   lib/mplug163/player.rb