Integrating example of R Markdown handling

_episodes_rmd/06-rmarkdown-example.Rmd → _episodes_rmd/07-rmarkdown-example.Rmd

 ---
-title: "Demonstration of a lesson written using RMarkdown"
+title: "Using RMarkdown"
 teaching: 10
 exercises: 2
 questions:
@@ -28,7 +28,6 @@ Normal output:
 1 + 1
 ```
 
-
 Output with error message:
 
 ```{r}