
- proper gradient rendering
  this needs latest gradient support in Qt 4.3

- load WPG in OLE container
  this needs support for memory stream in POLE

- PDF options, e.g. landscape/portrait, page size, fit to page, etc

- batch conversion, e.g. lots of WPGs to SVGs
  (menu Tool, Batch Convert...)

- progress when rendering PDF, because some WPGs may lock Perfectspot
  this needs some listener change in libwpg

- option for JPEG export, e.g. quality

- for smooth zooming, put the renderer in other thread so it won't slow down 
  the main interface (on slow system)
