Fix startxref. Now test pass.
Make page object as orphan so that GC can collect obsolete page.
Discard unused object as far as possible.
Support binary image inside pdf.
Use BEST_COMPRESSION for deflate if there is binary image.
Kindle3 fix. Kindle3 does not allow EOL whitespace at cross reference section. (!?)
Code clean up, loop zip entries until image file.
Call stopSelf of service after conversion is done.
Support width and height.