fixed default value as 0 in querying
Merge pull request #3 from littleq0903/fixed-default-0-problem

Fixed default 0 problem
Added update, insert APIs to Record APIs.
Merge pull request #5 from littleq0903/update_insert_record

Added update, insert APIs to Record APIs.
fixed wrong method name
Merge pull request #7 from littleq0903/fixed_put

fixed wrong method name