Adds docpad-plugin-sunny for deploying build to S3.
Adds config to activate S3 deploy.
Oops. Adds procfile.
Convert procfile to use 'docpad generate'.
Fixes skipUnsupportedPlugins config flag.
Properly configures docpad-plugin-sunny for S3 deploy.
Adds postinstall script rather than install script.
Moves from deploy with heroku to travis.
Moves back to using main docpad package rather than custom branch.
Sets production mode on travis so privacy check is skipped.