move DialectInterface#map(Metadata, NamedValues) to Metadata#map(NamedValues) and rename Metadata#getProperKeyValues(T) to Metadata#map(T)
improve DialectInterface's documentation
forgot to update DefaultSqlDialect
rename actual DatabaseInterface#find methods by DatabaseInterface#findOne
improves DatabaseInterface doc and adds all(), ref(Class, Object) and ref(Class, String, Object) to DatabaseInterface