Update to latest upstream release.
Also:
- Change License from EPL to EPL-1.0.
- Eliminate unnecessary BRs and Rs.
- Install the error message text file.
- Eliminate rpath from the library.
- Force libtool to not defeat -Wl,--as-needed.
- Be explicit about library versions as required by latest guidelines.
- Filter out unnecessary Libs values from pkgconfig files.
- Package doxygen tag file to enable cross-linking.