Pan Update

Here's another snapshot.

• implement article_get_sources.
• add and add_folder function to create a folder and map it in the db.
• various compile related fixes to pan/pan, mostly to use glib for _() and friends.
  
• have vserver load groups alphabetically.
• remember to import un-subscribed groups.
• make sure group description is utf8.
• fixes to grouplist.
• add grouplist demo to tests (as gtk)
• support for the new file format was added at some point
  

I created the grouplist demo to check performance and functionality since Pan does not fully compile yet. On my windows system it loads 43124 groups in 4.7 seconds. The demo is capable of sorting by name, total, and unread. It will import your existing pan data if it has not already been done.

rev. 121