README update.
README update.

pfcoperez/crossdata,ccaballe/crossdata,luismcl/crossdata,Stratio/crossdata,gserranojc/Crossdata,jjlopezm/crossdata,compae/Crossdata,gserranojc/Crossdata,miguel0afd/crossdata,compae/Crossdata,miguel0afd/crossdata,hdominguez1989/Crossdata,pmadrigal/Crossdata,pmadrigal/Crossdata,pfcoperez/crossdata,ccaballe/crossdata,hdominguez1989/Crossdata,jjlopezm/crossdata,luismcl/crossdata,darroyocazorla/crossdata,darroyocazorla/crossdata,Stratio/crossdata