upgraded to capistrano 3.3.5
only run delayed_jobs tasks if server has role worker
define servers that don't have capistrano db and workers roles
cache workers for status page
fix syntax error
increase session duration to one day
Merge branch 'master' of github.com:articlemetrics/lagotto into dlm

Conflicts:
	Gemfile.lock
	config/initializers/session_store.rb