Update jasmine from the future for better stack trace

Using assert in Jasmine 1.3.0 doesn't give you a proper stack trace. However, this is fixed in 1.3.1 but it's hard for us to bring in all the changes. So I'm brining in a change to fix this particular problem. For posterity here is a link to the code I copied:
https://github.com/pivotal/jasmine/blob/1c2e50d244c07c16b217cdbc26ee17c27ea24033/src/core/Spec.js#L120-127