||Rule is an abstract class for describing rules.
||RuleConstraints is a class for constraints applicable to rules.
||A static class that returns the base for "default values" which rule-style
operators use, rather than making the user specify them all on a per-
||RuleIndividual is an Individual with an array of RuleSets, each of which
is a set of Rules.
||A SimpleInitializer subclass designed to be used with rules.
||RuleSet is a set of Rules, implemented straightforwardly as an arbitrary-length array of Rules.
||RuleSetConstraints is an basic class for constraints applicable to rulesets.
||RuleSpecies is a simple individual which is suitable as a species
for rule sets subpopulations.