Unfollow app for Twitter

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1. Now get a notification for new followers and new unfollowers.
2. Notifications can be enabled and disabled in app settings.
3. Frequency of new follower and unfollower notification can be changed in the settings.
4. Fixed laggy UI issue when the number of followers are large.
5. Added loaders where ever needed.
6. Bug fix of app data corruption after few days of use.
7. Other minor Bug fixes