First version of the menu.
- Added HTML5 code.
- Added CSS3 code.
- Added the sources.
Revert "First version of the menu."

This reverts commit 0560eb1e0d0568b77c591642cca006c8c0c81c4e.
Revert "Revert "First version of the menu.""

This reverts commit e52f010d07a40d287ebc637d48545c169589026a.