Add Podfile to the project's tree.
Update OROpenSubtitleDownloader to v0.2
Remove unused XMLRPC pod.
Add two options to the preferences window (UI only for now).

- Rename .srt like the movie file
- Automatically check for updates + Check Now
Store 'Rename .srt like the movie file' option value in preferences.
Add Sparkle and bind it to 'Check For Updates...' menu item.
Bind 'Automatically check for updates' checkbox and 'Check Now' button.