HaikuDepot: Added WonderBrush and Paladin screenshots in resources
HaikuDepot: Added ability to load archived BBitmaps resourced.

 * SharedBitmap should probably be moved into its own file.
 * Untested as of yet.
HaikuDepot: Added ability to store screenshots in PackageInfo.
HaikuDepot: Allow to force other size on BitmapView
BControlLook: The spacing values need to be rounded...

 ... or they will cause all sorts of graphics glitches and layout
 problems.
HaikuDepot: Scrollbars for content, document window look

 * All text views that potentially need scrolling are now
   embedded into a CustomScrollView. That one controls a
   vertical BScrollBar only and has B_NO_BORDER frame. Since
   the regular BScrollView doesn't do some adjustments in
   this setup, the CustomScrollView takes care of moving the
   BScrollBar such that the B_DOCUMENT_WINDOW_LOOK resize
   handle does not obscure the bottom arrow button.