Babel3 2.0 is the first officially supported version of this
program. Prior to this, the program "Babel2" (babel2.cpp) was an unsupported
OEChem example, despite its critical functionality. Hence the promotion.
"Babel2 v2.0b1" was this program's beta, prior to renaming.
Built with OEChem 1.3.4.
Performance has been improved significantly (x3 in typical use).