adds README note based on @annie-l's note.
adds README note based on @annie-l's note.
LessonPlanet/wraith,saulirajala/wraith,LessonPlanet/wraith,guimoreira07/wraith,marciovicente/wraith,deividmarques/wraith,deividmarques/wraith,adouglas/wraith,peruukki/wraith,OfflineAudio/wraith,sbelyea/wraith-sbelyea.github.io,LessonPlanet/wraith,webdev1001/wraith,jlarusso-canvas/wraith-time-diff,marciovicente/wraith,sideci-sample/sideci-sample-wraith,marciovicente/wraith,saulirajala/wraith,BBC-News/wraith,sbelyea/wraith-sbelyea.github.io,frob/wraith-selenium,jaredstehler/wraith,OfflineAudio/wraith,peruukki/wraith,webdev1001/wraith,jzinkdi/wraith,BBC-News/wraith,frob/wraith-selenium,adouglas/wraith,deividmarques/wraith,BBC-News/wraith,adouglas/wraith,jzinkdi/wraith,jlarusso-canvas/wraith-time-diff,jaredstehler/wraith,webdev1001/wraith,saulirajala/wraith,jzinkdi/wraith,guimoreira07/wraith,guimoreira07/wraith,sideci-sample/sideci-sample-wraith,frob/wraith-selenium,jaredstehler/wraith,peruukki/wraith