Iteration through an SD file

CDK/Jython
copied from http://www.redbrick.dcu.ie/~noel/CDKJython.html The original author is Noel O'Boyle.

CDK/Java
from CDK java document http://pele.farmbio.uu.se/nightly/api/org/openscience/cdk/io/iterator/IteratingMDLReader.html