More rss refactoring

-Finally updated to new version
-Made some renaming changes, updated references in MainScreenSocialView
-Improved performance of scrolling through list of items using ViewHolder pattern in RSSAdapter
-Improved the comments a bit
-New class RSSParser, helped get rid of that huge doInBackground() method in RSSTask
-RSSTask now shows a ProgressDialog when it retrieves information from the internet
-RSSTask now takes a String parameter and returns a RSSDataContainer

For some reason my commits are showing things that were done 2 weeks ago by Greg and Robert I wish I knew how to change this but I'm not that familiar with Git. Everything I actually did is in the rss package. Also I forgot to unstage a simple change in the AndroidManifest (just a newline character)