Feedback TableView is not shown on 64 bit machine

Feedback TableView is not shown on 64 bit machine. It is happened on iPhone5s and 64 bit Simulator.

`UITableViewDataSource` defined `(CGFloat)tableView:(UITableView *) tableView heightForRowAtIndexPath:(NSIndexPath *) indexPath`. Currently `AAMFeedbackViewController ` returns `float`. CGFloat is implemented with `float` on 32 bit, but it is double on 64 bit. Type miss match between interface and implementation isn't casted. Therefore, TableViewCell height become 0 on 64 bit machine.