Generalised Line Format Framework

[mtekman]

Allow the user to supply the display characters and supply a list of org properties/elements and their values which apply to to each display character. IDK how this would work out.

Maybe something like:

'((lineformat1 . ("%2.1f | %3d"  . (:percent :nwords)))
  (lineformat2 . ("%5d -- %s" . (:nlines :something))))

So users can pull whatever data they need from an org heading (which is already summarised in a :plist) and format it however they want, and then they can just switch quickly between different lineformats.