Ymris interactive editor

To make it easier to explore the features of Ymris, we have provided a basic interactive editor. The simplest way to run this editor is to execute `ant interactive` in the download directory.

The editor will display a two-pane window. On the left is an editable script pane. This contains commands to describe RDF data, rulesets, and expectations of what RDF data should be produced by running the current ruleset on the current data. The results of running the script are displayed in the right-hand pane.

The result pane is updated when editing activity in the left pane has ceased for a couple of seconds.

By default, the script in testing/scripts/defaultScript is loaded into the editor. You can save the current script state with the SAVE button.