org-weights modified to work with outline/outshine buffers too. Display etc
works, but 'org-weights-at-point-for-outline' does not seem to calculate the
right numbers. First attempt to be improved.
first version of org-weights that works with org-mode and outshine buffers and
can display subtree weights as well as hidden-lines-cookies. Calculation of
hidden lines is still slightly buggy. Calculation of number of paragraphs for
outshine buffers is still buggy. Should there be the option to display
hidden-lines-cookies only when the headline is folded?