Updated for release 0.5

src/Todo

@@ -18,13 +18,10 @@ Library Features:
   + read and write unknown tags 
 + Make it possible to force write from metadata (just an optional arg to write?)
 
-+ change Exif keys to "'Exif'.IfdName.TagName"
 + Get rid of Image::detach and make Image open files on-demand 
 + Make Image::doWriteMetadata do its work in a single pass
 
-+ Add Key class hierarchy, undo Metadaum hierarchy
-+ Make sure IptcData supports unknown dataset (best done with Key class that handles
-  Ids)
++ Make sure IptcData supports unknown dataset (with Key class that handles Ids)
 + Revise Image and IptcData+ExifData API (aka turn it inside out)
 + Add PSD images support (and TIFF, NEF, CRW...)
 + Add support for XML metadata files