create tab bar layout and controller for Statistics
Edit AppDelegate after adding tab bar layout
little fix
create new class for statistics results
configure table cells; create NSManagedObjectContext property
Passing NSManagedObjectContext from AppDelegate to statistics views
make connection between master and detail statistics controllers
Add CoreData context property to detail statistics controller
create master campaigns class in order to subclass MasterViewController
move methods from parent MasterView class to child class
Change classes in iPhone storyboard
create setManagedObjectContext method in DetailStatisticsViewController.m and call it in MasterStatisticsViewController
edit iPhone storyboard - set Custom Class for statistic views
rename MasterStatisticsViewController class to CategoryStatisticsViewController
create helper class
move customers categories to helper class
configure table cells to show customers count by category
set new segue identifier and implement segue action in MasterViewController
comment some of the statistic categories
add badge with records count for each custome group