[TACHYON-94] Reuse header and footer in UI code

Solve the problem mentioned in TACHYON-94 "Reuse header and footer in UI
code".
[TACHYON-94] Fix the format problem

use one space instead of two spaces before id
Merge pull request #394 from PasaLab/TACHYON-94

[TACHYON-94] Reuse header and footer in UI code
[TACHYON-62] Implement a Netty based DataServer
upgraded netty.  moved worker shutdown after boss.  style
got transferTo to pass tests
refactor pipeline and added commented out code for next test
enable switch between epoll and nio
testing out epol with file region
moved file region logic to response encoder
moved nio server to nio package.  made a new DataServer interface to abstract over the implementations
pluggable network type
added sync group
more opts for netty
added mapped file support
more data server tests and test refactor
removed mapped file transfer type
updated netty
made netty settings configurations
removed sync group since it slowed things down