A patch for issues 8 & 9

[Joshua Bassett]

Hey Jester-hackers,

There's a couple of issues to do with Jester not playing nice with
JSON responses:

http://code.google.com/p/jester-js/issues/detail?id=8
http://code.google.com/p/jester-js/issues/detail?id=9

I had to fix these in order to be able to use Jester in my current
project. My git diff patch is attached.

Thanks for the awesome framework that is Jester!

Josh