add picture to markdown code example

Example 1: how to insert an image in markdown

![image info](./pictures/image.png)

Example 2: markdown embed image

![Image of Yaktocat](https://octodex.github.com/images/yaktocat.png)

Example 3: add image in markdown

![alternative text](image_name.png "Image Title")

Example 4: markdown add image

Here's our logo (hover to see the title text):

Inline-style: 
![alt text](https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 1")

Reference-style: 
![alt text][logo]

[logo]: https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 2"