We should recurse though all subspecs to get every header
We should recurse though all subspecs to get every header

Before this change only a single level of subspecs were being documented.

Fixes #57

ashfurrow/cocoadocs.org,jogu/cocoadocs.org,squarefrog/cocoadocs.org,ashfurrow/cocoadocs.org,CocoaPods/cocoadocs.org,neonichu/cocoadocs.org,squarefrog/cocoadocs.org,neonichu/cocoadocs.org,briancroom/cocoadocs.org,jogu/cocoadocs.org,briancroom/cocoadocs.org,neonichu/cocoadocs.org,squarefrog/cocoadocs.org,CocoaPods/cocoadocs.org,briancroom/cocoadocs.org,jogu/cocoadocs.org,CocoaPods/cocoadocs.org