Update example perlanetrc for Perlanet v3.0.0

examples/perlanetrc

@@ -13,30 +13,30 @@ feed:
   file: atom.xml
   format: Atom
 feeds:
-  - url: http://www.badscience.net/?feed=atom
+  - feed: http://www.badscience.net/?feed=atom
     title: Bad Science
     web: http://www.badscience.net/
-  - url: http://cectic.com/rss.xml
+  - feed: http://cectic.com/rss.xml
     title: Cectic
     web: http://cectic.com/
-  - url: http://www.climate-resistance.org/feed
+  - feed: http://www.climate-resistance.org/feed
     title: Climate Resistance
     web: http://www.climate-resistance.org/
-  - url: http://teenatheist.wordpress.com/feed/
+  - feed: http://teenatheist.wordpress.com/feed/
     title: Diary of a Teenage Atheist
     web: http://teenatheist.wordpress.com
-  - url: http://www.mediawatchwatch.org.uk/wp-rss.php
+  - feed: http://www.mediawatchwatch.org.uk/wp-rss.php
     title: Media Watch Watch
     web: http://www.mediawatchwatch.org.uk/
-  - url: http://blog.newhumanist.org.uk/feeds/posts/default
+  - feed: http://blog.newhumanist.org.uk/feeds/posts/default
     title: New Humanist Blog
     web: http://blog.newhumanist.org.uk/
-  - url: http://feeds.feedburner.com/scienceblogs/pharyngula
+  - feed: http://feeds.feedburner.com/scienceblogs/pharyngula
     title: Pharyngula
     web: http://scienceblogs.com/pharyngula/
-  - url: http://richarddawkins.net/feed.php
+  - feed: http://richarddawkins.net/feed.php
     title: Richard Dawkins Foundation
     web: http://richarddawkins.net/
-  - url: http://feeds.feedburner.com/SamHarris
+  - feed: http://feeds.feedburner.com/SamHarris
     title: Sam Harris
     web: http://www.samharris.org/