Fix readme.mkd badges
Fix readme.mkd badges

thumbor/thumbor,voxmedia/thumbor,kkopachev/thumbor,okor/thumbor,kkopachev/thumbor,okor/thumbor,kkopachev/thumbor,thumbor/thumbor,gi11es/thumbor,thumbor/thumbor,voxmedia/thumbor,scorphus/thumbor,scorphus/thumbor,thumbor/thumbor,scorphus/thumbor,okor/thumbor,kkopachev/thumbor,gi11es/thumbor,scorphus/thumbor,voxmedia/thumbor,gi11es/thumbor