Parallelize stop and restart to be faster with many workers.
Add group.  Add note about /bin/su
Add max_run_time info to Timeout::Error exception
Remove unnecessary curly brace from last_error.

First introduced in 2b23b80, which added a "{" at the beginning.
Move "Contributing" section into dedicated document for better GitHub integration

See https://github.com/blog/1184-contributing-guidelines.
Delete failing spec
Mark failing shared specs as pending
Convert specs to the new RSpec expectation syntax

See http://myronmars.to/n/dev-blog/2012/06/rspecs-new-expectation-syntax
Fix the Travis Status in the readme [ci skip]
Removing AR2 compat. DJ3 only clames to work with Rails 3+
Merge pull request #438 from ryanatwork/master

Fixes the Travis CI Status link in the readme
Merge pull request #414 from bootleq/last_error

Remove unnecessary curly brace from last_error.
Merge pull request #394 from ronen/patch-1

Add group.  Add note about /bin/su
Merge pull request #440 from rwz/removing_ar2_compat

Removing AR2 compat. DJ3 only claims to work with Rails 3+
delayed_job command to allow bundle exec if required
Revert "Mark failing shared specs as pending"

This reverts commit c445fc780558808113e410237004c9683e65a174.

Conflicts:
	lib/delayed/backend/shared_spec.rb
Move spec for root implementation details to worker_spec from shared_spec
Have persisted record error check new_record?
Only check for ArgumentError if the object being tested responds to new_record?
Ignore .bundle directory