FormatterRegistry extends ConverterRegistry now; FormattingConversionService extends GenericConversionService

leniently fall back to the passed-in method if a bridge method couldn't be resolved (for Groovy 1.7 compatibility)

Added entity conveter null checking; updated from string converters to simply test str.length() as pre-processing check

moved generic converter to spi; added entity converter; removed various service impls in favor of service factory

RESOLVED - issue SPR-6321: Regression: ResourceEditor in 3.0 does not ignore unresolvable placeholders, but it did in 2.5.6

AnnotationMetadata returns Class values by default (again), allowing for explicit retrieval of String class names where preferred (SPR-5827)