update code on a website that is html / css crretir

For costaricaretirement.com: Update to the latest bootstrap and jquery. Remove carousel and css and js for it, keeping the first one that says LIVE YOUR DREAM IN COSTA RICA. Combine the front page image with the text as one image. Remove owl.carousel.min.css and all references. Defer offscreen images. Fix the menu. Fix image sizes. Clean up css and js in pages. Put css in pages in style.css. Remove popper.js since it is in the new jquery.