Add option to configure TableView style for storyboard usage (#74)

Author: Tobisaninfo

Source/QuickTableViewController.swift

@@ -33,7 +33,7 @@ open class QuickTableViewController: UIViewController, UITableViewDataSource, UI
   open var clearsSelectionOnViewWillAppear = true
 
   /// Returns the table view managed by the controller object.
-  open private(set) var tableView: UITableView = UITableView(frame: .zero, style: .grouped)
+  open var tableView: UITableView = UITableView(frame: .zero, style: .grouped)
 
   /// The layout of sections and rows to display in the table view.
   open var tableContents: [Section] = [] {