githhub readme link code example

Example 1: markdown image

![GitHub Logo](/images/logo.png)
Format: ![Alt Text](url)

Example 2: markdown code snippet

```javascript
var s = "JavaScript syntax highlighting";
alert(s);
```
 
```python
s = "Python syntax highlighting"
print s
```
 
```
No language indicated, so no syntax highlighting. 
But let's throw in a <b>tag</b>.
```