Openwrt

Hi @ktsaou 

I just upgraded my OpenWRT and was able to get FireQOS running on it. I had two problems:
* OpenWRT does not have modprobe, even as an optional install, just insmod
* Its date command does not understand %N, nor does sleep understand decimals

So I made a couple of changes and am submitting them for your consideration.

FWIW I have documented my install process, currently here: http://test.firehol.org/installing/openwrt

Cheers
Phil