Incorrect TableCell creation corrected

Cell must be of SHMCalculationScreenTableCell class, not standard UITableViewCell.
New UIViewController for FolksList screen

SHMFolksListViewController added. StoryBoard modified to use this controller for the middle screen in Tab Bar controller.
Changed the name for this tab to "Участники" in storyboard.
UITableView and UITextField added
It's possible to add new participants and they are shown in folksscreen tableview
Adding and Deleting rows functionality, Methods for getting information added. [4980792]

Public methods for returning names and participants numbers created. They will be needed for other modules. Added functionality for swiping on the row and delete it
added social friends adding controllers
refactoring

- убрал из public методы доступа к различным свойствам списка участников, вместо этого вывел туда сам property списка
- переделал интерфейс под storyboard
Merge branch 'task/4980878-СalculationScreen'

Conflicts:
	MoneyPlan/en.lproj/MainStoryboard.storyboard
added file to .gitignore
minor changes in prom file
New object CalculationModule

Almost empty object with definitions of methods for debts calculation
Debts calculation fully works [4980928]

Singleton object SHMCalculationModule can be called from other controllers to calculate debts. Debts are being calculated based on TempListForGettingTransactions.plist - temporary plist with all transactions. Calculation Module is being called from SHMCalculationScreenViewController.