Merge pull request #12 from sallen450/master

update chapter 8 to preface.md
Update README.md
remove trailing whitespaces & fix code highlight
Merge remote-tracking branch 'upstream/master' into format
Merge pull request #13 from eclipselu/format

remove trailing whitespaces & fix code highlight
Update README.md
fix code highlight & wrong image
Merge pull request #14 from eclipselu/format

fix code highlight & wrong image
Update README.md
Update README.md
add english version
modify read me
fix typo
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
add chapter 11