Update README.md
change Binlog::Binlog argument names
socket_set_timeout DOES NOT work for sockets created with socket_create or socket_accept. Use socket_set_option instead.
Merge pull request #45 from cnxzcxy/master

php api:use socket_set_option instead of socket_set_timeout
change meanings of hexists,zexists
add compaction IO speed limitation
update api/php/SSDB.php
1.5.0
1.5.1 add pidfile
adding multithread
1.5.3 bugfix: server abort on ssdb-dump
update ssdb-benchmark
update ssdb-benchmark
add leveldb-import, add Link::request API
1.5.4
fix compile warnings
change PRIi64 to PRId64
update leveldb Makefile to not build .so
change empty macro in log.h to do-while-0
change PHP API to use stream socket.