md file insert picture code example
Example 1: add image to readme
![alt text](http://url/to/img.png)
Example 2: markdown embed image
![Image of Yaktocat](https://octodex.github.com/images/yaktocat.png)
![alt text](http://url/to/img.png)
![Image of Yaktocat](https://octodex.github.com/images/yaktocat.png)