listFix() Files

Version 2.1.0 contains some critical bug fixes and lots of new features
building on what was introduced in 2.0.0. I have much more to add, but
it was time to get this set of improvements stable and out there for 
everyone to try. Thanks to Sarah for putting up with all the time I 
spend in front of a computer, to Pierre for taking the time to help me 
improve this app, and those those few generous souls who have donated :)

As always, please report any bugs you find.

New Features:
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- "Fix everything" button (magic wand icon), first finds exact matches, 
  then runs a closest match search on all the missing entries that remain
- Can now create a playlist from scratch (Ctrl-N, menu item under "File", 
  or via the "getting started" panel)
- A play button in each row of the closest matches results screen to 
  preview potential matches
- Ability to extract all the playlists from the winamp media library 
  to a new location
- Cancel button for all long-running opeations
- Saving a playlist is now nearly instantaneous
- Major memory usage improvements and a roughly 40% running time 
  improvement for the batch find closest matches operation
- Swtiched font to SansSerif for much better international support (shows 
  Latin, Japanese, Korean, etc. characters that Verdana couldn't handle, 
  among other reasons)
- Entries that are aren't missing but are found outside the media library 
  are now updated to a location inside the media library if found 
  there too
- Switching off "use UNC paths for mapped drives" will revert the media 
  library to a mapped drive representation if applicable
- Can now drag multiple entries through the playlist at once (this 
  should feel more natural now, implemented via Java's Drag-n-Drop API)
- Can drag a playlist from the playlist panel into the current 
  playlist as an insert
- "Edit filenames" and "Replace" will operate on multiple entries
- Open dialogs for playlists now let you pick multiple files
- Refresh button for the playlists panel
- Can also multi-select (even directories) in the playlist panel and hit
  either the enter key, or the Open button, to open playlists 
  (recursively for directories)
- More flexible parsing of M3U files to deal w/ extra data added by 
  some players (lookin' at you MediaMonkey...)
- Can launch URLs for playback

Bug Fixes:
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- Solved a major problem with saving files out relatively
- Fix playlist appending/insertion via the '+' button