Traffic shape now taken from least of sync rate and BRAS profile
Change user account to Pi, now that I use my Raspberry Pi for traffic shaping
get_gw_ping.py now prints the gateway IP if run from a terminal (no output otherwise)
wondershaper: Fix definition of local traffic

Prior to this commit local traffic was defined as any traffic that
explicitly mentioned the traffic shaping device's local IP (e.g.
192.168.1.1). However, this is a bad definition as internet traffic that
goes through an ADSL routing that applies NAT will make the packets
explicitly state they are for this local IP.

This patch narrows the definition to packets which mention the traffic
shaping device's local IP *and* the other end is a local subnet (e.g.
192.168.x.x).
wondershaper: Fix reference to INTERNET->LAN queue (class should have been 1:1, but was erroneously 1:10)
Rewrite wondershaper to use iptables to classify LOCAL and INTERNET->LAN traffic. Cannot get either tc or iptables to classify LAN->INTERNET traffic for some reason.