updated readme in preparation of 2.0.0 release
updated readme in preparation of 2.0.0 release

giveucar/groundwork,giveucar/groundwork,groundworkcss/groundwork,mehdroid/groundwork,giveucar/groundwork,Scheirle/groundwork,groundworkcss/groundwork,mehdroid/groundwork,groundworkcss/groundwork,socialengineers/groundwork,socialengineers/groundwork,Scheirle/groundwork,mehdroid/groundwork,socialengineers/groundwork,Scheirle/groundwork