The PING Release :-))

Add networking (bridge) support to Qemu, ping works! :-)

• Upgrade to Linux v3.18.2
• Upgrade to BusyBox v1.23.0
• Massive updates to README, thanks to @elofu17
  • Add motivation and spell check
  • Add requirements and a few instructions forhow to get qemu-bridge-helper working
  • Add info on how to upgrade the kernel, if needed
• Use the Qemu bridge helper to connect a tap to virbr0 as
  a non-priviliged user
• Disable ifplugd, instead ...
• Use BusyBox ifup to bring up Debian style /etc/network/interfaces
• Convert udhcpc script /share/udhcpc/default.script to use logger
• Add PCI support and a few PCI NIC drivers to kernel, default: RTL8139
• Disable kernel CONFIG_VIRTIO_CONSOLE, messes up regular console!
• Minor bug fixes and polish