Update to modern raven-js

No idea how any of this works, but it was brought to my attention that a really old version of the client is being used.

Check out the changelog for 1.0 -> 1.1 to see if anything else needs to be updated from your end. http://raven-js.readthedocs.org/en/latest/changelog/index.html#id7

Let me know if you have any other questions.