Merge pull request #1 from federecio/master

populate gossipSeeds so that they can be automatically passed as a parameter into the template
Add the ability to restart the process without reconfiguring, using
previously generated configuation files, registering the service using
saved state.
catch illegal state exception
protect against concurrent access
Really fix the concurrent modification issue.
add convenience method to allow autoconfigured services to add new properties after the service has been registered