update README.md
Merge pull request #370 from ideawu/dev

update README.md
update README.md
Merge pull request #372 from ideawu/dev

update README.md
update README.md
Merge pull request #373 from ideawu/dev

update README.md
things about substr, getrange
Merge pull request #375 from ideawu/dev

things about substr, getrange
Add hrlist, zrlist, qrlist commands
Merge pull request #378 from ideawu/dev

Add hrlist, zrlist, qrlist commands
add jemalloc doc folder
update
Merge pull request #394 from ideawu/dev

Dev
update ssdb-ins.sh
Merge pull request #395 from ideawu/dev

update ssdb-ins.sh