Adds .gitignore file
Upgrades Bootstrap 2 to Bootstrap 3
Modifies head.html

- Removes unnecesary HTML attributes
- Changes Bootstrap CSS file path
Removes html5.html file
Adds new default.html file layout
Adds new navbar markup

- This navbar is simpler
- Includes some Bootstrap custom styles taken from the examples
Modifies index page

- Modifies text structure
- Adds some headers
Modifies footer.html

Simplifies markup and makes it more elegant