glog: remove glog due to support on ubuntu 12.04

It seems glog has been removed from the ubuntu 12.04 repositories.

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
libzlog: add Log::Open for opening an exisitng log

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
server: implement the sequencer protocol

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>
Merge pull request #1 from cruzdb/wip-seqr

seq server protocol and basic log maintenance