Allow requesting to browse for a directory.
Allow requesting the browser to display an option to return a black item.
Swap the ‘Up’ and back buttons in the browser.
Properly reset string settings that were changed in rgui.
The file browser will start in the directory of the currently seleected file.
The setting menu will display only the filename instead of the full path.
Path settings can specify a list of extensions to search for.
All properties are marked (nonatomic)
All table view cell reuse identifiers are now constant string objects.
Where appropriate all calls to [RetroArch_iOS get] are replaced with self.navigationController.
All calls to objc_setAssociatedObject use proper keys rather than string literals.
