#1440 ongoing order by non base attributes
#1440 sort by likes and mapviews initial implementation working. pending specs and possible optimizations
#1440 Ongoing move of size and rows calc inside Visualization model
Merge branch 'master' into issue-1440
#1440 Added filtering by size or row_count
#1440 Specs (not finished but working) + related bugfixes
#1440 Specs stabilization
#1440 Specs stabilization
#1440 Specs stabilization
Merge pull request #1611 from CartoDB/issue-1440

New visualizations listing orderings
Update NEWS.md
Merge branch 'master' into issue-1439

Conflicts:
	app/models/visualization/collection.rb