Add double tournament selection

Allow fitness to not be memo-ized (re-evaulate every generation)

Write more tests

Support for freezing state using Storable or Data::Dumper or something

Non-aligned crossover

Better POD for EA-n00bs ;)

Rewrite the slow stuff in C, doesn't that sound fun?

Consider some way of combining A::E::Util, StringEvolver, ArrayEvolver
