Fixed bug with hiding text fields user name and password on home page.
Added methods to class HomeViewController:
	- (void) textFieldDidBeginEditing: (UITextField*)textField;
	- (void) textFieldDidEndEditing: (UITextField*)textField;
	- (void) animateTextField: (UITextField*)textField up: (BOOL)up;
These methods needs for moving view up when user is editing text fields and moving down when user ends edit.