Resolver SPI.

This package is a service provider interface for plugin libraries that manage a particular type of statement store. A {@link org.kowari.resolver.spi.ResolverFactory} is provided with resources via the {@link org.kowari.resolver.spi.ResolverFactoryInitializer} interface when it is installed. Thereafter, the factory produces {@link org.kowari.resolver.spi.Resolver}s which may create, modify and delete models, and which produce {@link org.kowari.resolver.spi.Resolution}s to {@link org.kowari.query.Constraint}s.