Installing Fastai on Ubuntu Notebook

Hi all. I wrote a small notebook detailing how to install fastai on ubuntu. I also address few of the issues that I faced while installation which might be of help to someone.

Link to the notebook: https://github.com/TheShadow29/FAI-notes/blob/master/notebooks/Installation.ipynb

Feel free to create an issue if there is anything I have stated incorrectly, or report it here itself.