Cleaned up MarkovChain a little more. There were some debug printfs surrounded by if statements. Made the flag that turned these on into a static final  - this should mean the if statements will not be compiled in if false. 
Cleaned up MarkovChain a little more. There were some debug printfs surrounded by if statements. Made the flag that turned these on into a static final  - this should mean the if statements will not be compiled in if false. 

Added comment about odd coding surrounding Gibbs operators - don't want to fiddle but looks suspect to me.
JifengJiang/beast-mcmc,JifengJiang/beast-mcmc,JifengJiang/beast-mcmc,JifengJiang/beast-mcmc,JifengJiang/beast-mcmc