Convert specs to RSpec 2.99.2 syntax with Transpec

This conversion is done by Transpec 2.3.7 with the following command:
    transpec

* 677 conversions
    from: obj.should
      to: expect(obj).to

* 319 conversions
    from: == expected
      to: eq(expected)

* 118 conversions
    from: obj.should_not
      to: expect(obj).not_to

* 63 conversions
    from: obj.stub(:message)
      to: allow(obj).to receive(:message)

* 62 conversions
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)

* 43 conversions
    from: describe 'some controller' { }
      to: describe 'some controller', :type => :controller { }

* 39 conversions
    from: describe 'some model' { }
      to: describe 'some model', :type => :model { }

* 31 conversions
    from: describe 'some view' { }
      to: describe 'some view', :type => :view { }

* 22 conversions
    from: =~ /pattern/
      to: match(/pattern/)

* 17 conversions
    from: Klass.any_instance.should_receive(:message)
      to: expect_any_instance_of(Klass).to receive(:message)

* 16 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

* 14 conversions
    from: lambda { }.should
      to: expect { }.to

* 9 conversions
    from: it { should_not ... }
      to: it { is_expected.not_to ... }

* 8 conversions
    from: lambda { }.should_not
      to: expect { }.not_to

* 4 conversions
    from: Klass.any_instance.should_not_receive(:message)
      to: expect_any_instance_of(Klass).not_to receive(:message)

* 3 conversions
    from: =~ [1, 2]
      to: match_array([1, 2])

* 3 conversions
    from: describe 'some helper' { }
      to: describe 'some helper', :type => :helper { }

* 3 conversions
    from: describe 'some routing' { }
      to: describe 'some routing', :type => :routing { }

* 2 conversions
    from: Klass.any_instance.stub(:message)
      to: allow_any_instance_of(Klass).to receive(:message)

* 2 conversions
    from: obj.should_not_receive(:message)
      to: expect(obj).not_to receive(:message)

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Upgrade to rspec-rails 3.0.2

- Move local configuration to rails_helper
- Re-generate and configure spec_helper
- Require rails_helper in spec files
- Fix cases of describe :symbol
- Configure rspec-mocks to allow old-style mocking
- Allow stubbing methods not known to the stubbed object
Clean up Webrat remains
fixup! Upgrade to rspec-rails 3.0.2
Upgrad to rspec-rails 3.1.0
Add several TODOs regarding specs
Merge pull request #521 from publify/update-rspec

Update RSpec