[racket] WeScheme v57 release notes

Hi everyone,

WeScheme.org has been updated with the following changes:


* Fullscreen support for world programs, on browsers that support the
Fullscreen API.

The dialog features a fullscreen icon on the right side.  Escaping out
of Fullscreen will break out of the program.  Thanks to the folks
involved with the Google Hackathon for their contribution of this
feature.


* Preliminary iPad iOS auxiliary keyboard support.

When typing on an iPad into the interactions or definitions pane, an
auxiliary panel of useful keys (parens, symbols) will display above
the regular keyboard.  Thanks to Emmanuel Schanzer for contributing
this feature.


* Program notes

Programs can include notes.  During editing, the Note button to the
right of the program title provides a field for adding documentation
or notes.  Programs that are shared will include these notes on their
view page.