Log Message:
Changes 0.6.20:
* New translation: ro
* Updated translations: it, lv, sk
* --no-fixup now honoured during --create-exif to not create default tags
* Fixed crash when not enough components were given to --set-value
* Made --set-value more forgiving of whitespace
* Allow --set-value on UNDEFINED tags (treating them as byte arrays)
* Honour --machine-readable with --show-mnote and --show-description
* Turned on the --enable-silent-rules configure option
* Adding or removing a thumbnail can be done simultaneously with other options
* Allow --create-exif to be used in place of an input file