making it so that the zombie kernel version is added automatically
adding more comments to the Rakefile
making the code a little clearer - changes from Jens' commit 3bb294b68788e392f44b2c45258af560bbd6f409

https://github.com/jmoenig/morphic.js/commit/3bb294b68788e392f44b2c45258
af560bbd6f409
ScrollFrame scrollX() fix - catching up with Jens' commit 3bb294b68788e392f44b2c45258af560bbd6f409

https://github.com/jmoenig/morphic.js/commit/3bb294b68788e392f44b2c45258
af560bbd6f409
minor rejiggling of the about message
now the "close" icon on the top left of windows is drawn by its own class: CloseCircleButtonMorph
updating the document-generation script so to add the new class for the window-closing button, and to remove the morphicVersion.coffee file
rebuild and docs