Major update:
+ [NEW]: Updated demo with async image loading using the custom cell.
+ [NEW]: Added SDWebImage submodule for Demo purpose only. It's not needed to work with this component.
- [REM]: Removed thumbnail support feature.
- [REM]: Removed the AsyncImageView component
+ [NEW]: Updated the comments to show up in Xcode quick help.
+ [NEW]: Updated the design between the Manager and tableController internally to use delegates instead of blocks (What was I thinking).
+ [NEW]: an updated README.md