Uplink priority groups

New features:

• Uplink priority groups
• Handle PPP interfaces with no IP address
• Configuration file validation

PPP interface support: closed issues #6, #10, #11, #12

v1.1.0

Documentation fix

Closed issues #1 and #2

Closed issues:

#1: iptables' state module is obsolete
#2: Set /proc/sys/net/ipv4/ip_forward = 1

First public release

v1.0.0

Demo mode minor changes