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
