changes to Readme.md
changes to Readme.md

jcgertig/activeadmin-orderable,brightbytes/activeadmin-orderable,bolshakov/activeadmin_sortable_table,brightbytes/activeadmin-orderable,bolshakov/activeadmin_sortable_table,mvdstam/activeadmin-sortable,jcgertig/activeadmin-orderable,bolshakov/activeadmin_sortable_table,mvdstam/activeadmin-sortable