add some base set function
add set data type support(unfinished)
fix SAdd logic
refactor HScan
refactor scan
Merge branch 'develop' into scan-feature
list/bit/zset scan
remove print statement
add set operations: difference, union, intersection
use rawkey
add unit test
Merge branch 'develop' into scan-feature
add cmd_set commands and its tests
update test for ttl and bitmap
Merge branch 'scan-feature' into develop
update documents
Merge branch 'set-feature' into develop
refactor store, reduce code
fix undefine bug
update doc