SPLP: stop special treatment for firstPanel

it still seems to be Spaghetti code...hmm...
Fix typo in config
Bump twitter4j version ->3.0.4-SNAPSHOT
Add OpenImageActionHandler (issue #9)

Check content-length:->
ImageViewerFrame handle window closing
Bump twitter4j's version to 3.0.5
ImageCacher caches http 4xx error
VersionComparator is public domain
ImageCacher: fix regression in 11f46d1 for ccf767c

allocate buffer with just contentLength
VersionComparator: fix test regression (fixes #20)