Merge pull request #56 from Masterlvng/master

word correction
add timeout
Merge pull request #57 from Apache9/jodis

add timeout
fix jemalloc
fix install go doc reference
check group id is exists when set slot status
Merge pull request #60 from wandoulabs/bug_fix

check if group id  exists when set slot status
Update tutorial_zh.md
Update tutorial_en.md
update fe & add check slot status before setting proxy online
Merge pull request #61 from wandoulabs/bug_fix

update fe & add check slot status before setting proxy online