default report location determined by location of jbehave jar

StoryReporterBuilder has an instance field outputLocationClass which is, by default, defined to be the StoryReporterBuilder.class object. This is then passed into a StoryLocation object as part of a FilePrintStreamFactory constructor. StoryLocation uses the class object to convert to a URL. Thus we are using the location of jar as the default reporting location.

StoryLocation should just take a URL in its constructor, not a class.

StoryReporterBuilder should have either use the outputDirectory.toURI().toURL() as the URL to pass in or setup a default of new File(".") (current working directory) in order to pass into StoryLocation. outputLocationClass should be removed.