- Idea: a FactorGraph and a RegionGraph are often equipped with
extra properties for nodes and edges. The code to initialize those
is often quite similar; maybe this can be abstracted to classes
like ExtFactorGraph and ExtRegionGraph (Ext stands for Extended), e.g.
template <typename NodeProperties, typename EdgeProperties>
class ExtFactorGraph : public FactorGraph {
	public:
		std::vector<NodeProperties>               nodeProps;
		std::vector<std::vector<EdgeProperties> > edgeProps;
	// blabla
}
A disadvantage of this approach may be worse cachability.
- BipartiteGraph::isConnected should be optimized.
- http://www.boost.org/development/requirements.html#Design_and_Programming
- Would it be a good idea to cache second-order neighborhoods (delta's) in BipGraph?
- Would it be a good idea to add the variable label -> index hashmap in FactorGraph,
  to replace the linear searches that are performed every time for findVar()?
  No, a better idea is to avoid calls to findVar() as much as possible.
- Can the FactorGraph constructors be optimized further?
- Solve the proliferation of type checks for all different ENUM's in
properties.cpp
- Remove x2x?

TODO FOR RELEASE:
- Test Visual C++ compatibility
- Figure out which libraries are required and document in README
  boost headers, boost::program_options library, boost::graph library,
  boost::math library (under Windows)
- Change email address

FILES IN SVN HEAD THAT ARE NO LONGER RELEVANT FOR GIT MASTER:
diffs.h
index.h
util.h
util.cpp
bipgraph.h
weightedgraph.h
weightedgraph.cpp
clustergraph.h
clustergraph.cpp
varset.h
var.h
utils/createfg.cpp
exceptions.h
exceptions.cpp
enum.h
doxygen.conf
example.cpp
FILEFORMAT
Makefile
exact.h
exact.cpp
alldai.h
alldai.cpp
properties.h
properties.cpp

FILES IN SVN HEAD THAT ARE STILL RELEVANT:
ChangeLog
README
TODO
prob.h
factor.h
factor.cpp
factorgraph.h
factorgraph.cpp
regiongraph.h
regiongraph.cpp

daialg.h
daialg.cpp
bp.h
bp.cpp
hak.h
hak.cpp
jtree.h
jtree.cpp
lc.h
lc.cpp
mf.h
mf.cpp
mr.h
mr.cpp
treeep.h
treeep.cpp

matlab/*
tests/*
utils/*


DOCUMENTATION READY:
- bipgraph.h, bipgraph.cpp
- var.h