Bring in Canonical's updates to the 3.13.0 kernel

This incorporates Ubuntu-3.13.0-24.47

The biggest change that will likely affect kernel panics is the movement
from _ieee80211_is_robust_mgmt_frame() to ieee80211_is_robust_mgmt_frame()
this should clear up the kernel panics for recent kernels, though it
may cause them to return on old kernels

If you're getting kernel panics, make sure you update to the latest
kernel

Fixes #54