remove useless lines
check chap2 to chap6
modify the command lines in blockquotes
check chap9 to chap20 for seperating cn from en-cn
check chap21 to chap30
check chap31 to chap37
Merge pull request #55 from gansteed/gh-pages

more readable, more native.
get Chinese from bilingual edition
delete a space
generate chinese edition automatically
correct the path of images
Unix-like -> 类似 Unix -> 类 Unix, 还有一些其他的增删改
类似 Unix -> 类 Unix