some readme changes
some readme changes

leosmeira/spree_pag_seguro,heavenstudio/spree_pag_seguro,eoy/spree_paytrail,saurabhbhatia/spree-pp-website-standard,saurabhbhatia/spree-pp-website-standard,heavenstudio/spree_pag_seguro,agencyleroy/spree_paytrail,agencyleroy/spree_paytrail,tomash/spree-pp-website-standard,tomash/spree-pp-website-standard