Fixing tests

Upgraded jspec to fix make test not actually running any tests.

Also removed a broken test. It was added in this commit:
http://github.com/visionmedia/js-yaml/commit/0c4c354ddc32c2d46588d8064c28b9d4e1b1d134

But there isn't a matching fixture and it didn't seem to have anything to do with lists...