Merge pull request #447 from ideawu/dev

improve SSDB.php for large response
Merge pull request #449 from ideawu/dev

udpate ssdb.sh
Merge pull request #450 from ideawu/dev

update ssdb.sh
Merge pull request #452 from ideawu/dev

Add max_open_files config, default is 100
Merge pull request #453 from ideawu/dev

remove var var_slave folders
add auth
Merge pull request #458 from ideawu/dev

Rewrite hexmem, this affects log messages
Merge branch 'patch-1' of https://github.com/cinience/ssdb into cinience-patch-1
update ssdb-dump to support old style args
Merge branch 'cinience-patch-1'
update Changelog
Merge pull request #459 from ideawu/master

sync with master