Added --version flag to pit-cli. Bugfix in FileRepository

* `FileRepository` was incorrectly returning the root project's first
  set of subprojects for the `getRootProjects()` function, instead of the root
  project itself.

pit-cli/project.properties

@@ -1,8 +1,8 @@
-#Fri, 21 Oct 2011 16:19:53 -0500
+#Tue, 25 Oct 2011 11:32:31 -0500
 build.dir=build
 src.dir=src
 build.jar=pit-cli-${application.version}.${build.number}.jar
-build.number=9
+build.number=13
 expected.application.version=2.6.0
 lib.dir=lib
 release.dir=release