Adds UserStats specs. Renames user.js file to user_stats.js
Fixes tabsize
Refreshes sprites
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  Keep base resource path when redirecting in visualization admin controller
  use group map view in share dialog to match the main map view
  fixed #2471
  fixed #2457 and #2180
  Scope queries to user in Visualization::Locator
  Reverse order on visualization stats
  Adds billing period calculation to user model
  cdb updated
Moves user_stats html to a template. Adds more specs. Adds upgrade_url var to the html
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  fixes vizzuality/cartodb-management#2483 - fixes vizzuality/cartodb-management#2494
  Use new attributes to generate user stats
  fixes vizzuality/cartodb-management#2484
  fixes vizzuality/cartodb-management#2497
  indentation fixed
  fixes vizzuality/cartodb-management#2480
  fixes vizzuality/cartodb-management#2476
  layer selector selected by default
  Adds period_end_date and map_view_quota to Users
Fixes specs.
Fixed export bug in the Dashboard (#2502)
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  Link ghost tables only on index and show of tables endpoint
  Refactor Visualization::Locator
  fixes vizzuality/cartodb-management#2505
  Adds default period_end_date when the user does not have one
  Return mapviews of the current billing period on the user API
  added specs for gruplayer