1. Refactor WirelessNetworkScanner::updateInfo(), it's too long.
2. Add support for storing/editing wireless card profiles.
3. Add support for activating wireless card profiles.
4. Remove old default gateway routes before adding them in NetworkInterface::start()
5. Investigate to see whether we have to worry about bringing down iface aliases
6. Add configure requirement for dhcpcd for now (until we have more... precious)
