am 8345fb97: am ac70173d: am 1d270087: am 61a76f2d: am f15017fc: am 326c70ef: Doc change: Add play dev guide page with index card and shareable download.

* commit '8345fb9731bf842e1044d7c6fd4d4c19f4284ca4':
  Doc change: Add play dev guide page with index card and shareable download.