Merge pull request #135 from kageiit/master

Cleaned up durationFrom in RRTime
Avoids crashing when the disk is full
Opens Google Play links externally
Backported v2 subreddit storage. No longer cuts off subreddit list if you have 100+ subscriptions.
Removed duplicate copyright notices
Added ability to subscribe to and unsubscribe from subreddits
Subscription related bugfixes
Updated changelog
Enabled "bulk" fetching of subreddits
Bugfix
Removed some debug logging
Fixed saved/hidden bug
Made Main Menu customisable (under Settings > Menus), and added ability to view mod mail, submitted posts, downvoted posts
Added ability to view subreddit sidebar