add restangular to bower dependencies
add Restangular to app
retrieve articles from API
use today's date in snippet filter
display the right date in popovers
display the right source logo in articles
remove unused code
enhance slugify
retrieve only articles for current year from API
use the new ref_dates API format
do not display articles referencing past dates
update year filter with new ref_dates format
Merge branch 'connectedToAPI'