Add cluster wrapper at the resource level in order to ensure resource clusters are accessed from the proper context.
Refactor resource election handling to ensure election results are executed in the proper context.
Update Vert.x lock example for asynchronous resource API.
Merge branch 'log-api' of github.com:kuujo/copycat into log-api
Merge branch 'log-api' of github.com:kuujo/copycat into log-api