Merge pull request #130 from jinglong/master

add content for chapter 12
修改daemon和单进程方式的描述，以免产生关于nginx的daemon配置指令和master_process指令有点混淆的歧义
Merge pull request #135 from ideal/master

修改daemon和单进程方式的描述，以免产生关于nginx的daemon配置指令和master_process指令有点混淆的歧义。感谢ideal的贡献。
Merge pull request #136 from jinglong/master

add content for chapter 12(filter module)
Merge pull request #137 from jinglong/master

update readme
fix typo

see: https://github.com/taobao/nginx-book/issues/88
     https://github.com/taobao/nginx-book/issues/44
remove autoconf and automake, add make instead
增加ngx_str_t变量定义之后再赋值的一种方法
移除ngx_prealloc()
remove autoconf and automake, add make instead

See https://github.com/taobao/nginx-book/issues/134
增加ngx_str_t变量定义之后再赋值的一种方法

See https://github.com/taobao/nginx-book/issues/139
移除ngx_prealloc()

See https://github.com/taobao/nginx-book/issues/140
Merge branch 'master' of https://github.com/ideal/nginx-book
按照nginx的风格，强制转换后增加空格
Merge pull request #141 from ideal/master

关于编译工具，ngx_str_t变量赋值，ngx_prealloc()的几处修改. Thanks to ideal.
Update chapter_02.rst

修改笔误：”是否“->”释放“
Merge pull request #143 from RocFang/patch-1

Update chapter_02.rst, fix typo, thanks to RocFang.
add content for chapter 12(http ssl)
change \t to 8 spaces
update chapter 12