changes to support OS X
Geiser should now be in package.el
I use package's org mode now
Add more Racket formatting rules
Get rid of latex-pdf-preview in favor of latex-pdf-compile

I never want to look at the pdf in Emacs because it's fugly. I'll just use
external readers until Emacs becomes my OS.
Add org-reveal
add some org reveal settings
Set up org-reveal to load automatically
Add languages to org-babel