prevent Cheerio rendering escapes non-ascii UTF-8 characters

Cheerio do the rendering escapes by default to avoid xss attack.It will convert all non-ascii characters to utf8 code.It is terriable for the web developer  when they get things like this "`&#x8FD9;&#x662F;&#x4E00;&#x4E2A;&#x4F8B;&#x5B50;,this is a example`" after they run the generator.
XSS protections is not important as yeoman-generator is generator system ,not a webapp.

So this patch switch if off.

Issue which is concered.
https://github.com/yeoman/generator/issues/638#issuecomment-54393019