Accessability improvements

updated the internal page links to link directly to the dividers and
removed the anchor tags as apparently that's a thing now (previously
when I had tried this it had not worked).

replaced certain tags with head tags (h2, h3, etc) to help with
readability with screen readers, etc.
SVG corrections + Navigation improvement

Changed the SVGs to include a viewbox attribute so IE displays them
correctly.

Changed the Navigation to be mobile friendly at smaller widths.

Made the gallery images change the cursor to a pointer when on
mouse-over and added a link to the examples sub-domain under the
portfolio title.