memo, routine updates
add new API, state_change_callback
zht.conf edited online with Bitbucket
add #include <unistd.h> to htworker
Merge branch 'master' of https://bitbucket.org/xiaobingo/iit.datasys.zht-mpi
buf fixed: missing getopt.h
add replica
makefile
Merge branch 'master' of https://bitbucket.org/skxie/zht-eventual-consistency
set up replica list
Merge branch 'master' of https://bitbucket.org/skxie/zht-eventual-consistency
merge with original repo