rename services to repositories
add VisitCollection
sort visits in VisitCollection
move VisitCollection to lib
add PageviewCombiner
PageviewCombiner WIP
PageviewCombiner combine method
Visit spec, pageview combinable? spec
Pageview#combinable?
add #start_timestamp method to visit
move sorting and comparison to Visit, add VisitsController with #index view, integration spec
display list of visit pageviews
order pageviews correctly, test for amount of visits
reuse timestamp of pageview instead of event timestamp
Merge branch 'master' into play_whole_visit