TODO
====

- convert to OOP rather than functional programming

- balance_graph(accountname, from, to, fileoutput)
  uses gnuplot to graph

- ptsb new option:

  -e <expression> | --expression <expression>

  where expression is a mathematical expression like

  '<300'
  '=300'
  '>=300'

  the expression will test the euro amount column
  echo " <    300" | perl -lne '/([<,>,>=,<=,=])\s*(\d*)/; print $1."-".$2'


IN PROGRESS
===========

- test units (using Mock Objects)
  in progress
