make unread items easier to read.
replace googlereader commands with oldreader commands in documentation.
popular items are not supported by The Old Reader.
Merge branch 'master' of git://github.com/akrennmair/newsbeuter

* 'master' of git://github.com/akrennmair/newsbeuter:
  popular items are not supported by The Old Reader.
  replace googlereader commands with oldreader commands in documentation.
  make unread items easier to read.