Separated Forest
Minor fix
Fixed an error when BirthDeath is considered.
More fix
Merge remote-tracking branch 'origin/sepforest'

Conflicts:
	ClusterTree.cpp
	ClusterTree.h
	MCMCEnv.cpp
	MCMCEnv.h
	RJMcmc.cpp
	build.sh
	mcmc.cpp
	mcmc.h