Add script attribute to Options class, providing the name of the running script.

corelib/src/options.dart

Index: corelib/src/options.dart
diff --git a/corelib/src/options.dart b/corelib/src/options.dart
index 7224f788cd16ed113e6f6611d47406bbe6058430..ab1b0c9fec2ab52862644735b6704d617605b5c9 100644
--- a/corelib/src/options.dart
+++ b/corelib/src/options.dart
@@ -21,4 +21,9 @@ interface Options default RuntimeOptions {
    * this list.
    */
   List<String> get arguments();
+
+  /**
+   * Returns the path of the script being run.

[Mads Ager (google), 2012/01/20 11:38:03]

To mirror the comment above: "being run in this isolate."?

[Bill Hesse, 2012/01/20 16:05:58]

Done.

+   */
+  String get script();
 }