Merge remote-tracking branch 'upstream/master' into fix-column-name

* upstream/master:
  adds an index for the job-queue runner
  adds safe object type for stack traces (closes #19)
  fixes variable name
  add runTime and closedAt to overview/detail

Conflicts:
	Entity/Job.php
Fix addDependency method

addDependency replaced addJobDependency a lot of time ago
Merge pull request #33 from dlondero/patch-1

Fix addDependency method
Merge pull request #30 from tunght13488/fix-column-name

Explicit specify column name to deal with different naming strategy (underscore)
Fix : after cloning a job, relatedEntities was null instead of an ArrayCollection.
Merge pull request #41 from Galilee/galilee

Cloning a job
Adding template name options to the controller to make sure the right one gets rendered.
Created queue option and parameter in the entity.
Adding queue for templates and commands
Removing integer cast
Creating a basic queue system
Making the queue use the option if provided.
Adding in the ability to limit how many concurrent queues there can be
Fixing bug that @Seldaek noticed.
Switching to an index for queues.
Making the Job Repository on grab 1 item if there are some available in a queue.
Removing queue setter on job
Creating a constant for the default queue.
Adding a few more jobs to the test.
Fixing Space on Job.php
Removing unneeded else
Switching to a shortcut for incrementing.
All failed jobs must have "Retry Job" button
Merge pull request #49 from 66Ton99/retry

All failed jobs must have "Retry Job" button
Switching Default Queues and concurrent jobs to 4.
Adding a few more tests.
Fixing a bug with the available queue grabber.
Update index.rst