Merge pull request #32 from jinglong/master

update chapter 12
Merge pull request #33 from jinglong/master

update readme
Merge pull request #34 from jinglong/master

fix the wrong date in log
[*] 测试更新目录
Update chapter_11.rst
Update README.rst
Update index.rst
Update chapter_02.rst
Fixed some typos.
[*] update source/chapter_c.rst
[*] Update source/chapter_c
[*] Update chapter_c
[*] Update chapter_c
Merge pull request #43 from fanjizhao/master

Fixed issue-40 and issue-41
update chapter 10
update test
Update chapter_10.rst
Update chapter_10.rst
update
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