Merge branch 'hotfix' into 'master'

Hotfix

修改文档

See merge request !10
Merge pull request #1 from JobsDong/develop

Develop
Merge pull request #2 from JobsDong/develop

application db fix
Merge pull request #6 from JobsDong/develop

feature-search
Merge pull request #7 from JobsDong/develop

remove saejieba optimize
modify fetch_before in readme