Async setup and teardown

Async setup and teardown

Guys,

I've had to run some async code on my setup and teardown methods but it was not working properly.
Here's a simple patch to make it run and the corresponding test cases:
  http://github.com/fgrehm/qunit/compare/2dbf6037778266fa01a1...master


What do you guys think, is this really needed?


Cheers,
Fábio Rehm