added notification driver and topic support
added notification driver and topic support
fixed default to node
added notification driver support
added new line
Merge pull request #364 from cloudnull/notification_driver

Merged automatically by jenkins after successful build test
Fix Bug: Empty chain_file is not nil, so causes errors
Merge pull request #365 from andymcc/sslchain_fix

Merged automatically by jenkins after successful build test
do not remove vhost_net anymore
Merge pull request #367 from rackerjoe/master

Merged automatically by jenkins after successful build test