building out the mapfolio and adding maps

- added lazyload.js on the main page only loads visible thumbnails (so on page open less than 8 load instead of all)
- added low-bandwidth page
    - no interactive map
    - no thumbnails
    - modal opens with a small (24-69 KB) jpeg preview image 
    - long description w/ map 'cards' on main page instead of at bottom of modal
    - option to choose a reduced-size PDF download (if available) on
- the reduced-size PDF option not yet incorporated into main page (due to issues with how bootstrap deals with the extended description that is hidden on the thumbnail card but used to populate the html of the modal)
- added BRC sit rep maps for Nov 22