Log Message:
Changes 0.20:
* Exiv2 utility
  - %a broken in rename
  - It should be possible to insert newlines in text strings.
  - Exif.Photo.UserComment unicode comment doesn't work
  - Added -g option to 'grep' info for individual tags.

* Exiv2 library
  - Pentax 645D makernote update
  - Update of Pentax makernote
  - Nikon Capture NX won't save a NEF file manipulated with exiv2 from SVN
  - Padding of XMP data results in invalid XMP JPEG segment larger
    than 65535 bytes
  - Add XMP support for src/metacopy
  - src/psdimage.cpp: operands of ? are integers of different signs
  - Wrong conversion of IPTC SpecialInstructions in copyIptcToXmp()
  - LLVM clang: error: default initialization of an object of const type
    'class Exiv2::IptcData const' requires a user-provided default constructor.
  - Exif.Image.SubIFDs should support more than 4 sub-IFDs
  - Nikon Makernote tags regression in exiv 0.19
  - ShutterSpeedValue should be a signed rational
  - Allow XMP sidecar files which start with a UTF-8 BOM
  - Image file gets deleted when writing to it
  - Writing to read-only TIFF-like file fails
  - "TIFF-safe" setExifData variant
  - Optimize binary array elements
  - Write support for Olympus RAW ORF files
  - Incorrect Unicode encoding of Exif UserComment tag
  - LensType not reported for Pentax K-x
  - Add support for makernote of Sony ARW files
  - Unable to write GPS data in ORF files with digikam