Add a regression test for urlToFile(directory)

Java on Windows really has problems in that department: the default
AppClassLoader is a URLClassLoader whose getURLs() method returns URLs
of the form:

	file:C:/path/to/file.jar

i.e. omitting a slash: it should read

	file:/C:/path/to/file.jar

instead, otherwise, when converted into a URI via the toURI() method,
then passed onto a File constructor, one will see the lovely message:

	IllegalArgumentException: URI is not hierarchical

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

src/test/java/org/scijava/util/FileUtilsTest.java

@@ -96,6 +96,10 @@ public void testURLToFile() throws MalformedURLException {
 		} else {
 			jqpublic = "/Users/jqpublic/";
 		}
+
+		final File jqpublicFile = FileUtils.urlToFile("file:" + jqpublic);
+		assertEqualsPath(jqpublic, jqpublicFile.getPath() + "/");
+
 		final String filePath = jqpublic + "imagej/ImageJ.class";
 		final String fileURL = new File(filePath).toURI().toURL().toString();
 		final File fileFile = FileUtils.urlToFile(fileURL);