add script for lazy loading images on page
move images sources on image list page to data-attrs
apply lazy-load script to images
add new route for stats page
add stats to navigation
factor out "no images" text into partial and remove stats from image list page
remove unncessary image-type counts from images method in controller
add stats method to app controller
add "no images" partial
add stats page view template
Merge branch 'create_stats_page'

* create_stats_page:
  add stats page view template
  add "no images" partial
  add stats method to app controller
  remove unncessary image-type counts from images method in controller
  factor out "no images" text into partial and remove stats from image list page
  add stats to navigation
  add new route for stats page

Conflicts:
	views/images.jade