Adds brand image folder.

This folder contains the images that will be used as the site's brand. My
personal photo has been added, and the header.ejs has been edited to
include my image. My image has also been given a circular frame through
CSS.
Adds further partial files to index.ejs

This commit adds the partial files for the whoami, getbusy,
whoshouldcontactme, nextmeeting, and socialmedia sections. It also adds
further documentation comments to index.ejs.

Some partial files have had their contents changed.