add cc-0 license to text files, fixes #968
add cc-0 license to text files, fixes #968

gozer/voice-web,common-voice/common-voice,gozer/voice-web,gozer/voice-web,gozer/voice-web,gozer/voice-web,gozer/voice-web,gozer/voice-web,common-voice/common-voice,common-voice/common-voice,common-voice/common-voice