Move user view functions to helper
Merge branch 'move-function-logic'
add calculation files to users_helper
Add number_of_artists

Performance has now slowed significantly due to loading 200 recent
tracks. Will need to optimize later.
add daytime and nighttime artist functions
Merge branch 'user-view-calculation-functions'

Conflicts:
	app/helpers/users_helper.rb
	app/views/users/show.html.erb
	config/initializers/recent_tracks_patch.rb
Merge branch 'master' of https://github.com/aschoks/daata