SERVER-7772 seperate master/slave code from replica set code
SERVER-7772 separate out finding_start_cursor
SERVER-7772 separate out ApplyOpsCommand
SERVER-7772 move pretouch into master/slave
SERVER-7772 separate out Sync class
SERVER-7772 move optime.h and create new optime.cpp
SERVER-7772 move all of optime into optime.cpp/.h
SERVER-7772 move oplogreader into db/repl/ and create oplogreader.cpp
SERVER-7772 move status-related code into replication server status
SERVER-7772 repl_reads_ok
SERVER-7772 repl_start
SERVER-7772 add header