Switch to a dark theme; move customizations for the light theme to the theme itself.
Make dwim-fold-org actually work.
Update presentation mode.
Betterer shell mode.
Recognize markdown files.
More mail filing.
Make dirtrack-mode work.
Don't rely on the buffer being in the lst, use the mode instead.
Make the cursor, uhm, whiter.
Don't set the shell vars as custom.