Load Diffscuss but do not bind any keys
Add a utility for sending buffer contents to ‘jrnl’
jrnl: Use quickrun instead of a custom command of my own

This patch reintroduces the ‘C-c q q’ binding for quickrun and defines
quickrun to run on files with the ‘*.jrnl.txt’ suffix.  This allows me
to write journal entries using text-mode in files with such an suffix
an feed those into ‘jrnl’ by invoking quickrun.