Convert specs to RSpec 2.99.1 syntax with Transpec

This conversion is done by Transpec 2.3.4 with the following command:
    transpec --no-yield-any-instance --boolean-matcher true,false

* 12 conversions
    from: be_true
      to: be true

* 8 conversions
    from: be_false
      to: be false

* 1 conversion
    from: pending
      to: skip

* 1 conversion
    from: pending { do_something_fail }
      to: pending; do_something_fail

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Fix predicates to return actual booleans.
Upgrade to RSpec 3.
Convert specs to RSpec 3.0.2 syntax with Transpec

This conversion is done by Transpec 2.3.4 with the following command:
    transpec --convert example_group,hook_scope

* 17 conversions
    from: describe 'something' { }
      to: RSpec.describe 'something' { }

* 2 conversions
    from: failure_message_for_should_not { }
      to: failure_message_when_negated { }

* 2 conversions
    from: shared_context 'something' { }
      to: RSpec.shared_context 'something' { }

* 1 conversion
    from: after(:all) { }
      to: after(:context) { }

* 1 conversion
    from: before(:all) { }
      to: before(:context) { }

* 1 conversion
    from: before(:each) { }
      to: before(:example) { }

* 1 conversion
    from: failure_message_for_should { }
      to: failure_message { }

* 1 conversion
    from: match_for_should { }
      to: match { }

* 1 conversion
    from: match_for_should_not { }
      to: match_when_negated { }

* 1 conversion
    from: shared_examples_for 'something' { }
      to: RSpec.shared_examples_for 'something' { }

* 1 addition
      of: RSpec.configure { |c| c.expose_dsl_globally = false }

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Address additional rspec warnings.
Upgrade to recommended RSpec 3 settings.
Qualify constant so it resolves on 1.9.2.

It was failing with:

NameError
  uninitialized constant RSpec::ExampleGroups::InterpolTestHelper::RSpec::Core
Merge pull request #42 from seomoz/upgrade-rspec

Upgrade rspec