Added logger.
Added winston.
Launch method excepts a callback at the end to handle any last errors.
Added handling of more cases.
Improved index file.
The target is now also an event machine to handle proper call propagation.
Engine now excepts next parameter.
Changed option r to f and removed exit clause from callback because it is too late to exit at this stage.
Fixed typo.
Code cleanup.
Slightly improved local.
Improved ssh to handle error message correctly.
Target now handles errors correctly.
Version bump.