Add note about useful ansible-playbook options to roadmap
Set the default level for the bang.util.log logger.

On Centos 6, it was either unset or set to a level that prevented any
output from going to the console regardless of the value of
console_level.  It could be a Python 2.6 or Python 2.6 multiprocessing
adaptation.  Regardless, this new default makes it work as expected.