PoDoFo 0.3
    - Add configure checks for zlib, freetype and fontconfig

FUTURE
    - PdfString needs to handle (optionally?) encoding & decoding of Unicode strings
    - More filters (read & write)
    - Content stream parsing
    - Support for attaching an ICC profile to an image or content stream
    - PdfWriter should be able to write objects immediately and not keep all in
      memory first (ie stream-oriented writing)
      -and/or-
    - Deferred and possibly progressive stream loading during document-write
      out to save memory (ie deferred writing)
    - Support for reading & writing encrypted PDFs
    - Some more drawing routines (tiles, save and rstore?) also finish cleanup
      the existing ones revamp color support to be more general & support more
      types
    - Interactive forms support
