Version 4.2.2
- Building for CCP4
- Fix is_cis

Version 4.2.1
- The previous version was a bit overly strict
- Introduce a --quiet flag.

Version 4.2.0
- Changes for packaging
- New mmCIF DSSP output, added several categories

Version 4.1.0
- Based on new libcifpp version 5

Version 4.0.6
- Prevent heap buffer overflow writing annotated mmCIF file.

Version 4.0.5
- The options for loading custom dictionary files and the like are now
  visible in the help again.

Version 4.0.4
- New version string logic
- Improved makefile

Version 4.0.3
- Fixed makefile

Version 4.0.2
- Dropped support for reading bzip2 files directly. gzipped is still supported

Version 4.0.1
- Switch from GNU configure to cmake as the build environment

Version 4.0.0
- Write the secondary structure information as an annotation to an mmCIF file
  (old format is still available as an option)
- Added the recognition of Poly-Proline helices
