Added text and a video placeholder to homepage

By Geoff

Added some text to the home page as well as adding a video placeholder
to our homepage which will eventually be replaced by a video introduction
to the Project Coway Game of Life.
Formatting of the code.

Paired by Geoff and Michael

Formatting the code to make it look prettier.
Added GitHub Ribbon

By Geoff

Added a 'Fork us on github' banner to the website.
Changed the placeholder video on the homepage to be about the Game of Life.
Programmed by Michael (Feature #87)
Merge pull request #63 from CO600GOL/feature/#87_home_page

Feature/#87 home page