Code refactoring, modernization, localizable strings, and new methods and properties.

API Changes

• The updateContent method is now public, and allows for a forced content update
• The logoutOfDropbox method is now public. Calling this method will sign out the current user and dismiss the app's privileges. You app must request permission to use Dropbox again after logging out.
• The currentPath property is now readonly. Changing this property from readonly could have unexpected behavior.
• The fileName method has been deprecated. Use the currentFileName property (readonly) instead.

Code Refactoring

• Refactored code to modern Objective-C Syntax
• Changed id to instancetype and moved init method declarations to the header
• Converted typedef enum to typedef NS_ENUM(NSInteger, kConstant)
• Fully auto-synthesize properties
• NSDictionary and NSArray syntax updates

Resource Updates

• Moved file icons from the Graphics folder to an XCAssets Catalog named, DropboxMedia.xcasset.

Localization

• All DropboxBrowser user interface strings are now NSLocalizableStrings. This provides developers with the opportunity to localize DropboxBrowser.

Known Issues
No known issues