add spinner below products list while fetching next page
cleanup comments
added spinner to collection page
Merge pull request #49 from goodybag/49-paging-spinner

loading spinner when infinity-scroll is loading
merge master
Merge branch '54-infinite-loop' of github.com:goodybag/website-panel into 54-infinite-loop
Merge branch '54-infinite-loop' of github.com:goodybag/website-panel into 54-infinite-loop