v2.3 - Update to CDK 2.3. This features AtomContainer2 by default, new features for MassSpec, and a large nubmer of bug fixes.
v1.5.12 - Updated to the latest stable CDK release which features namy improvements including the new Depiction module.
v1.4.1 - Updated to latest stable CDK release (updates many atom types)
v1.3.11 - Updated to latest stable CDK release
v1.0 - Wrap CDK libs as a separate R package. Allows for faster development on the
       interface package
