Add 2 methods:
* Resque.delayed? MyJob => Boolean
* Resque.next_delayed_schedule MyJob => timestamp
Merge branch 'master' into delayed

Conflicts:
	lib/resque_scheduler.rb
Merge remote-tracking branch 'upstream/master' into delayed
fix rubocop warnings
add Resque.delayed?
fix rubocop complains
adding Andrea Campolonghi to authors.md
Merge pull request #365 from andreacfm/master

Add Resque.delayed?