Modify NodeLogger to use a format consistent with rsyslog

Example, instead of:
D, [2013-05-22T09:02:27.336207 #7200] DEBUG Loaded cartridge (python, 2.6, 0.0.1)

It will look like:
May 22 10:44:30 DEBUG Loaded cartridge (python, 2.6, 0.0.1)