Parallelize stop and restart to be faster with many workers.
Don't implicitly require simplecov
Update Code Climate badge [ci skip]
The source :rubygems is deprecated because HTTP requests are insecure.
Use AR's implementation of #encode_with which uses attributes instead of @attributes

As of Rails 3.2.12, they can return different things.
For example, if the `foorbars` table has an integer column called "size" with default 0 and not null:

f = Foobar.new
f.attributes["size"].class #=> Fixnum
f.instance_eval{@attributes}["size"].class #=> Arel::Nodes::SqlLiteral

This fixes an issue where:

Foobar.new.to_yaml

would raise an error:
ArgumentError: wrong number of arguments (2 for 1)
  from gems/arel-3.0.2/lib/arel/expressions.rb:3:in `count'
Merge pull request #479 from ngan/patch-1

Use AR#attributes instead of the instance variable
Fix attempt to update Psych encode_with
Added coveralls.io coverage badge
added coveralls gem, updated spec_helper
Merge pull request #485 from lemurheavy/master

Added code coverage badge.
updated coverage badge image / url

Uses https://coveralls.io/r/collectiveidea/delayed_job instead of the lemurheavy/delayed_job fork.
Merge pull request #486 from nickmerwin/patch-1

updated coverage badge image / url
add support for rails 4.0
Make specs more compatible with Rails 4

Patch from @agrobbin in
https://github.com/collectiveidea/delayed_job/pull/490#issuecomment-14267485
Merge pull request #490 from hasimo/rails4

support for rails 4.0
Fix activesupport dependency specification
Rename spec_helper to spec/helper
Handle dependencies in the gemspec
Prepare 4.0.0.beta1 release
Adding information about restarting delayed jobs

This is information I believe is correct, but I would love to know for certain