How to disable include feature

[zuojiang]

My markdown file include mustache code block.
e.g.

```html
<div>{{{html}}}</div>
```

I know {{{ html }}} that is ok, but this is a habit, I hope there is an ideal way to solve it. Thanks!!

[F1LT3R]

Maybe it would be better to have includes off by default, and allow people to turn it on if needed.

(I'm not sure how many people use the code blocks anyway)

Also, I'm open to ideas on other characters for blocks, {{{, }}} was probably a bad idea on my part.