Deprecate ConversionUtils class as a whole

All public methods (except for setDelegateService, which only
exists for backwards compatibility with already-deprecated
methods) are now deprecated in favor of ConvertService and
Types. So let's explicitly recommend those classes instead.

Author: ctrueden

src/main/java/org/scijava/util/ConversionUtils.java

@@ -40,15 +40,8 @@
 import org.scijava.convert.DefaultConverter;
 import org.scijava.util.Types;
 
-/**
- * Useful methods for converting and casting between classes and types.
- * <p>
- * For extensible type conversion, use {@link ConvertService}.
- * </p>
- *
- * @author Curtis Rueden
- * @author Mark Hiner
- */
+/** @deprecated use {@link ConvertService} and {@link Types} */
+@Deprecated
 public class ConversionUtils {
 
 	private static ConvertService convertService;