Add a "fork me on Github button" to the main page

[kalimar]

Also add a mention of where the code is coming from somewhere in the codebase.

[kalimar]

https://github.com/blog/273-github-ribbons -

[kalimar]

When you fork the repo you should submit a PR with your sites name to https://github.com/tech-meetup-website/tech-meetup-website

[kalimar]

Following this discussion dccodecoffee/dccodecoffee.github.io#3