fix css arrow
+++ more stuff
Smooth header in all browsers but IE8

Issues:
- in IE8 the small header is messed up
- in IE9/IE10 the nav items and logo are not perfectly aligned
Switch info-boxes to border-box box-sizing

This simplifies the width calculation of those boxes and fixes
a Safari bug which displaces the article box by 1px so that the
background is visible at the edge of the box.
Remove unused legacy info-boxes

Those were former trials.
Refactor info-box arrow css definition.
Rename info_box_flex to info_box / css class name.
Remove useless css class 'box-padded'
Removed unused paddind from header
optimize Brands/Mags/Newspapers for mobile sizes
fix store button width
better spacing for main pages
same structure for footer pages
build set up to combine, minify and timestamp assets
Added deployment support

For deploys to work you must add a deploy.yml file containing a hash
with ftp credentials (host, user, password, path).
Run middleman deploy to deploy...
All paths are relative so that the website also works in a subdir
Very basic signup form
Exclude svg's from built

Svg's are inlined to html pages and never served separately.
Social media links
Link graphical assets