
* let the user make more formatting choices
* document how to wrap your own report_size function
* add a report_size_in_html() function? or make generic "string-hooks" that
  can be used to have a $preamble etc?
* plain scalars do not yet print their address
* print blessed() argument (aka class) on request
* [ 1,2] is technically a ref to an array, \[ 1,2 ] is technically a ref to
  an array ref. Currently, the first is reported as "Array", the second as
  "Array ref". Is this right?
