#22 SourceChangeException should give more details

[Elliotte Rusty Harold]

Consider this common problem:

jester.SourceChangeException: Couldn't run test tester
because tests didn't pass before any changes made - see
FAQ at http://jester.sourceforge.net
at jester.TestTester.run(Unknown Source)
at jester.TestTester.doMain(Unknown Source)
at jester.TestTester.main(Unknown Source)

Jester should provide the nested exception. i.e. it
should say what test failed and why to make this easier
to debug.