Merge pull request #2 from mikespook/master

some tweakings
format adjusting
02.1.md
02.1.md
02.1.md
02.2.md
修正一些字面错误
Merge pull request #3 from zhanming/master

修正一些字面错误
02.3.md
02.3.md
02.3.md
02.3.md
02.3.md
02.3.md
02.5.md
fix character translate for 64bit.
add 04.1.md translate for ch 4.1
Merge pull request #5 from zhanming/master

添加第4章的第1节
04.1.md
02.6.md