Abstract site footer menus to data files

[reubenlillie]

Right now the collection of menus in the footer are hard coded. For code reuse and modularity, this feature really should be created from data files, like a siteFooter object in src/data/site.json. Then each submenu could be a child object of a menus property. For example:

"siteFooter": {
  "menus": [
    [
      {
        "href": "/about/",
        "text": "About"
      },
      {
        "href": "/news/",
        "text": "News"
      }
    ],
    [
      {
        "href": "/directory/",
        "text": "Find a Church"
      },
      {
        "href": "/map/",
        "text": "District Map"
      }
    ],
  ]
}