[TACHYON-62] Netty

Netty implementation of the data server.

This patch is not done yet.  Its intent is to show the work I have right now for commenting.

This PR should not be merged until performance results come in.
Here is the video where I saw this recommended: https://www.youtube.com/watch?v=WsMOJqAYW5M

Its untested if it works better, was planning to see today.