Bootstrap 2 -> Bootstrap 3, improved styling on map and narrowed containers on large desktops

Upgraded map page to bootstrap 3 and merged old custom.css into new style.css, then removed the "styles" folder. Also narrowed the slider containers, as well as limited all containers to a max-width of 970. Also, stopped Definition list from stacking on mobile, which was causing some strange formatting on the map. Mobile should have a bit better experience on the map now.