resolve/refinerycms — pull request #1066 by rjshade (2011-10-11 14:27:07+00:00)
Title: WYMeditor now allows 'placeholder' attribute for input elements

Last item in the list here:
http://www.w3schools.com/html5/html5_new_elements.asp

http://dev.w3.org/html5/spec/Overview.html#the-placeholder-attribute