revision from Chen Ping
revision from Liu Tao
Merge branch 'master' of github.com:bigwiv/Biopython-cn
update status
完成16章校队
Merge pull request #8 from xiaojay/master

完成16章校对
fix typo
Merge pull request #9 from xiaojay/master

fix typo
update status
fix link and image
Merge branch 'master' of github.com:bigwiv/Biopython-cn
chr05 revision from Guo Zhengyang
finish translation
Merge pull request #10 from zruan/master

Revision of Chr18
revision from youyuxing
update status
Merge branch 'master' of github.com:bigwiv/Biopython-cn
update status