Revert "pagination for entry indexes"

This reverts commit 3420f6c30c41b7e687b4ff30553233cb03773584.
Page resources are a bad idea, because:

- a page controller seems necessary, but won't have a clue what it's
  supposed to paginate;

- resource URIs become unstable.
correct indent for subscriptions controller
introduce filters
fix controller call to rake feed tasks
pagination for entry indexes
fix entry next and previous
refresh link in main banner
fix unread title weight in entry#show
nav link layout and global filters
fix nil redirect for next/previous entry
mark entry as read on show
streamline subscriptions#show rendering
clean up some styles