=flex($justify: space-between, $alignItem: initial)
  display: -webkit-box
  display: -moz-box
  display: -ms-flexbox
  display: -webkit-flex
  display: flex

  +prefixer(justify-content, $justify, webkit moz ms)
  +prefixer(align-items, $alignItem, webkit moz ms)



=flex-rows
  +prefixer(flex-wrap, wrap, webkit ms)
  +prefixer(flex-direction, row, webkit ms)
  +prefixer(flex-flow, row wrap, webkit)

=order($place)
  +prefixer(order, $place, webkit ms)