fix placing of footer
download of slides as pdf
add imprint and support pages
make phone number international
scale images on small screens
update html header
fix support page
better header in code-blocks-howto
add howto template
add lists to howto template
fix README
justify radius of tabs and prototype boxes in api documentation
workaround for doxygen bug: open div with id="top" in header.html
Merge branch 'master' of https://github.com/jonessen96/tntnet-homepage
add missing file