WL-2101 Add paras to go above and below the site type list

We will be moving the description of the difficult choice between using
a template and starting from scratch to an unordered list. These paras will
be added above and below to provide context.
WL-2101 Use new descriptions for with and without template options
WL-2101 Make case logic clearer and use html sensibly

Use paras instead of line breaks and introduce a surrounding div.
WL-2101 Move list of paras to `<ul>` and add the new context sentences
Merge pull request #7 from ox-it/WL-2101

WL-2101 Change the text on the 'site type' page when making a site