Merge pull request #3 from gsh199449/master

add the readme of ch6
update summary
Merge branch 'master' of github.com:gsh199449/docs into gsh199449-master

Conflicts:
	en/SUMMARY.md
Merge branch 'gsh199449-master'
update: en translation for chapter2
update: en translation for chapter2
Merge pull request #5 from sebastian1118/master

update: en translation for chapter 2
summary
Merge https://github.com/webmagic-io/docs