Add --debug and logging to omni.py
Add --debug and logging to omni.py

By default logging is at info level. If --debug command line switch is
used logging is at debug level. The logger named "omni" is configured
so all subordinate logging should use "omni." as the prefix to get the
proper logging hierarchy.

ahelsing/geni-tools,tcmitchell/geni-tools,GENI-NSF/gram,plantigrade/geni-tools,GENI-NSF/gram,GENI-NSF/gram,plantigrade/geni-tools,ahelsing/geni-tools,tcmitchell/geni-tools