load experimental org-bullet file, if available
Added function to send a region to the jrnl command.
configure ediff to use site-by-side windows
added multiple-cursors package and initial config
Install/configure color-theme-sanityinc-tomorrow

References:

- https://github.com/purcell/color-theme-sanityinc-tomorrow
- https://github.com/chriskempson/tomorrow-theme
font/theme customizations

- use sanityinc-tomorrow-bright as default theme
- if available, use "Source Code Pro", 16-pt as my default font on
  gordy30.