Requirement #1: Add <div> elements to sections in the html docs

I have added <div> elements to the required sections of the class reference pages. These are the class names in the <div> elements:

functions: "func"
types: "types"
variables: "vars"
properties: "prop:
related non-members: "relnonmem"
macros: "macros"
namespace: "nmspace"
classes: "class"
detailed description: "descr"