Merge pull request #1777 from blackpuppy/zh

[zh_CN] done /zh/getting-started/*.rst
[zh_CN] make corrections/improvements and wrap lines at column 80 in /zh/contributing/*.rst
[zh_CN] make corrections/improvements and wrap lines at column 80 in /zh/contributing/*.rst
[en] Cake application -> CakePHP application
[zh_CN] done /zh/installation/advanced-installation.rst
[zh_CN] small improvement in /zh/installation/url-rewriting.rst
[en] Cake application -> CakePHP application
Merge branch 'zh' into zh-work
Merge branch 'zh-work' into oschina