Added rules for header menu style. Its centered and fixed at top.
Added navbar on top of the page. Fixed top so it scrolls down with the user.
Modified and styled the top menu of the index. Also, deleted all useful images
and patterns.
Great error deleting important images.
Deleted an useful logo image.
Added normandie outline images to use in index
Added nexus SVG file
Added nexus svg file to the index. Re-arranged the icons vectors so
they can be shown a good way in large desktop.

Added the centered message and added a experimental font to it: Nunito.

Removed the .container class from the main container.