Created site structure from #4
updated stylesheet
added template for design

Signed-off-by: Benjamin Brockhaus <tulatex@burning-world.de>
Added example1 images and links for documentation page.
Reverted the use of variables in style.css
Integrated the navigation-bar on every page
removed variable in stylesheet

Signed-off-by: Benjamin Brockhaus <tulatex@burning-world.de>