Update layout of contact screen, add code to streamline navigation of contact screen

Add selectedButton property to contact view controller to prevent button being pressed
multiple times in rapid succession.
Change autolayout constraints of buttons and labels in phone and email table view cells
and add containing view to center in cell.
Update AACallButton to present phone image
Update layout information for contact property table view cells
Remove AASobrietyDateContactViewController
Add AAPopoverListView for adding new contacts

Create new AAPopoverListView class
Add API for creating AAPopoverLists by setting frame and triangle origin
Add popover view to AAContactListView and set delegate methods
Add popover list view for call button, change behavior of popover presentation

Add method for creating call contact popover view
Remove UIGestureRecognizers from contact list view
Use touchesBegan event to dismiss active popovers
Clean code in showPopoverView

Minor refactoring of code in showPopoverListView method
Change drawing constants for popover view