added import rake task to Readme
added import rake task to Readme

andrew/contribulator,jasnow/contribulator,wadtech/contribulator,jasnow/contribulator,Yomawa/contribulator,24pullrequests/contribulator,andrew/contribulator,Yomawa/contribulator,24pullrequests/contribulator,wadtech/contribulator,andrew/contribulator,Yomawa/contribulator,wadtech/contribulator,jasnow/contribulator,24pullrequests/contribulator