refs #3 : Updating kernel supports up to 3.13

 * Currently I'm testing on Linux kernel 3.13 (which is the default for
   Ubuntu 14.04 LTS)

   - Tests on other versions are welcome!

 * The latest ixgbe original driver seems to have kernel compatibility
   issues as well. I have back-ported some codes from it and added my
   own modifications.
Merge branch 'master' of https://github.com/PacketShader/Packet-IO-Engine