include: get includes polished and ready

fix errors with w3, fix the lines

Signed-off-by: Alex Naidis <alexnai00@gmail.com>
html: optimize title for "schule.php

Signed-off-by: Alex Naidis <alexnai00@gmail.com>
html: optimize title for "ich.php"

Signed-off-by: Alex Naidis <alexnai00@gmail.com>
php: Introducing php include() for head (head.include)

Signed-off-by: Alex Naidis <alexnai00@gmail.com>
include: renaming "body1.include" and "body2.include" to better filenames

"nav.include" and "footer.include" are here

Signed-off-by: Alex Naidis <alexnai00@gmail.com>
php: Introducing php include() for the nav bar (nav.include)

Signed-off-by: Alex Naidis <alexnai00@gmail.com>
php: Introducing php include() for the footer (footer.include)

Signed-off-by: Alex Naidis <alexnai00@gmail.com>