Change activerecord dependency to < 4.2
Merge pull request #86 from MSch/master

Bump activerecord dependency.
Prepare 4.0.1 release
Update mysql dependency to ~> 2.9
Add RuboCop
Fix RuboCop offenses
Enforce code coverage minimums
With the release of Rails 4, Rails 3.0 and 3.1 are no longer supported

See: http://weblog.rubyonrails.org/2013/2/24/maintenance-policy-for-ruby-on-rails/
Replace `should_receive` with new `:allow` syntax
Extract reserve methods.
Can be used to more easily monkey-patch the code to always use the default SQL statement (see #33)
Merge pull request #89 from csmuc/extract_reserve_methods

Extract reserve methods.
Prepare 4.0.2 release
Merge tag 'v4.0.2'

Version 4.0.2

Conflicts:
	lib/delayed/backend/active_record.rb