Home Screen writeup

Describes the home screen icons and various features.  Please review
Dave for accuracy.  Especially check the windows tile icon descriptions.
I couldn't really discover any useful difference between the "Arrange"
icon and the rest so I winged it.  The "Concepts & Facilities" tile
should be a blast from the past to Peter as that is what IBM (in his
day) titled all the device manuals :-)
Postexequeue update and images for other recent updates