Updated h-Element Styles
Updated mixins

* added @mixin transparent
*added @mixin transition
Added PT Sans as new copy font
Added basic link-styling
Removed content-sidebar.scss
Added Masterfooter Widgetarea and updated footer structure
Removed notes after comments
Streamlined header
Updated variables
Updated $content_width
Updated general padding and margin
Updated and added sidebar/widgets styles
Minor changes
Updated Version Build, Tags and Readme