20/6/07

to do
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- sort the population output
  - there is a hack in Population.numMacroClassifiers which prints the macroclassifiers 
    but it's not nicely done.
  - it should also have accuracy and experience columns added
  - it should sort rules by numerosity then accuracy
- implement macroclassifiers?


notes on design
---------------

Indiv
- uses the RuleCondition object to avoid being tied to one representation too much
  but I think it's still coupled to it e.g. subsumes() assumes there is a hash symbol.
- contains crossAndMutate which should perhaps be part of a GA class.


