Added support for last execution information in the scheduale
Fixed ClassLength defenintion check in rubocop.yml to appease rubocop
Added support for last execution information in the scheduale
A few minor tweaks on top of #326

including bumping the max ClassLength for rubocop (until there's a better
time to refactor stuff) and some minor style nitpicks.
Bumping rubocop ClassLength Max again ... for now!
Renamed set_last_run to last_enqueued_at
Merge remote-tracking branch 'YotpoLtd/feature-last-execution' into YotpoLtd-feature-last-execution

Conflicts:
	.rubocop.yml
	lib/resque/scheduler.rb
	lib/resque_scheduler.rb
	lib/resque_scheduler/server/views/scheduler.erb
Updating web ui to match method rename for last enqueued
Merge pull request #361 from meatballhat/YotpoLtd-feature-last-execution

@vladshub feature last execution