PLN will use the C++ Logger class for debug output
Fix PLN bug #650
Use standard math library instead of numpy for #671
Merge pull request #677 from cosmoharrigan/pln-logger

PLN will use the C++ Logger class
Update mln smokes example output
Update mln smokes data definitions
Update mln smokes example script and agent
Add useful debug logs to PLN chainer
Update interactive agent
Update mln conversion STV for ListLink to allow importance spreading
Merge pull request #678 from cosmoharrigan/pln-mln

PLN update to logger and updated "smokes" results