Logging

Logging with event emitters.

TOTAL UNFINISHED JUNK--HELP!

The following standard events are available for task authors and logger implementers. The node-task spec requires namespace support so any of the following may be called with sub-properties. For an example of this usage, please see the basic task example.

• debug - Loggers should only listen to these events when debug mode is enabled.
• info - Loggers should only listen for these events when verbose or debug is enable.
• notice - Loggers should always listen for these events unless quiet mode is enabled.
• success - Loggers should always listen for these events unless quiet mode is enabled.
• warn - Loggers should always listen for these events unless quiet mode is enabled.
• error - Loggers should always listen for these events unless quiet mode is enabled.

Needs a sample implementation. Should we try to use existing logging systems?