Markdown added. Notable features not previously present that were previously sticking points:

Code blocks, discord style

```C

#include <stdiio.h>
int main(){
	printf("Hello world!\n");
	return 0;
}
```

(note, the plugin isn't perfect, the closing backticks are supposed to be on their own line)

Result:

#include <stdiio.h>
int main(){
	printf("Hello world!\n");
	return 0;
}

Quote blocks, email style

Text
>quoted text
>>quoted-quoted text

Text

quoted text

quoted-quoted text