tweak hook cascading

[tj]

this should work:

describe('Batch', function(){
  var batch;
  beforeEach(function(){
    batch = new Batch;
  })

  describe('something', function(){
    describe('else', function(){
      it('should work', function(){
        batch.stuff()
      })
    })
  })
})

[tj]

weird, it is working as expected in the repo, i must have been using an alpha