Changed box-shadow from a normal property to a mixin
Bugfix: Corrected end tag for link title

Before, it was set as "hl", which was a typo. It is now corrected to "h1"
Bugfix: footer navigation links are functional

Previously, the links did not have the correct href values, so they would
not link to the pages. Now, they do link to the correct pages.
Removed link end tag (for IE 11 compatibility)

IE11 complains aboout using an end tag for a link element -- that is not
typical HTML styling. It is removed here.
Made dockbar always 50px high

Before, for widths over 980px, the dockbar was 49px high and then there
was a 1px bottom border of the same color. That did not appear as intended
in IE 11, 9 and 8, so instead the dockbar and inner container were
adjusted to be 50px high.