Merge pull request #277 from smfreegard/master

clamd plugin improvements
Merge pull request #278 from smfreegard/master

Remove node 0.4 support and require node 0.8 or newer.
Merge pull request #279 from smfreegard/master

Disable daemonize plugin
Merge pull request #281 from smfreegard/master

Fix for issue #280
Bug fix + add exponential delay to authentication failures