Minor doc issue. Dead Link to doc

[joelmaranhao]

In the intro a minor Markdown correction, use ```

 from breezylidar import URG04LX 
 laser = URG04LX('dev/tty/ACM0') 
 while True: 
   scan = laser.getScan() 
    # do something with scan, like SLAM 

pydoc breezylidar

or check out the online documentation <=== This link takes you to a 404

https://github.com/simondlevy/BreezyLidar/blob/master/breezylidar.html

[simondlevy]

Fixed, thanks Joel!