A1.8

external music loading

Add

• textbox can rename project name
• (lua) music_loaddir(dir) – load .wav .mp3 .ogg in dir
• (lua) music_playsound(sound) – play sound.wav
• (lua) music_playmusic(music) – play music.mp3/.ogg
• (lua) music_pausemusic() – pause currant music play
• (lua) music_stopmusic() – stop currant music play