Changes 0.21:
This release adds read and write support for Samsung SRW images and Samsung
makernotes. The exiv2 library now accepts a custom error handler and has
a setting to control which messages are generated. The exiv2 command line tool
has a new 'quiet' option which uses the new functionality to suppress all
library warnings. Some important API changes will allow many future image
format and makernote enhancements to be done in a binary compatible fashion.
The new exiv2.hpp umbrella header file further shields applications from
library changes.

(adam)