Tidy Up & Prepare for Public Tweet/Hacker News Post

Most of the _difficult_ work has been done replicating all the Bootstrap Styles! 🎉
No what need to do is tidy up and _publicise_ it!

## Todo

+ [x] Create Table-of-Contents so it's easy to find the section and _link_ to it.
+ [x] Switch to "dwyl" blue (teal) for examples where shading is used e.g: in the Grid System:
Pink is _nice_, but there isn't a _reason_ for us to be using it for this:
Where a darker shade is required use http://www.color-hex.com/color/4db6ac to get the appropriate shade.

+ [x] Add word "Tachyons" to all typography to clarify that this is _not_ a "Bootstrap" Heading

+ [x] Add GitHub "Star Count" Button/Number to top and bottom of the page to encourage others to Star it. e.g: [](https://github.com/dwyl/start-here) see: https://buttons.github.io

+ [x] Given that the site is `static` does it need to be on Heroku...? https://dwyl-tachyons-bootstrap.herokuapp.com >> Can we use GitHub Pages instead? https://github.com/dwyl/tachyons-bootstrap/issues/15#issuecomment-304431986
+ [x] Create a Subdomain e.g: http://tachyons-bootstrap.dwyl.com pointing to the GitHub Pages Page
+ [x] Add Google Analytics to track how many people view the page and where they came from.
+ [x] Prepare intro video: https://github.com/dwyl/tachyons-bootstrap/issues/9
+ [ ] Pick a good picture to use for the Tweet. [`help wanted`]
+ [ ] Make YouTube videos public
+ [ ] Add a comment on this blog: https://medium.com/@dakotaleemartinez/keeping-your-css-dry-with-tachyons-bb1c0dc66dce about tachyons bootstrap as it directly compares the two