update gitignore [ci skip]
add ruby 2, drop ruby 1.8 from CI
fix rspec version
rspec double framework is default anyway
change mock to double for rspec 3.0
Convert specs to RSpec 3.0.4 syntax with Transpec

This conversion is done by Transpec 2.3.6 with the following command:
    transpec

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

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

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

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

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

* 1 conversion
    from: obj.should_not
      to: expect(obj).not_to

For more details: https://github.com/yujinakayama/transpec#supported-conversions
update description slightly [ci skip]
require active_support before core_ext
drop ruby 1.9.2 from travis because of activesupport 4 not working
merge pull request #2 after rebase and fixing specs with transpec
Add support for v3 fields. Thanks @draffensperger (pull request #2)

Merge branch 'CruGlobal-added-v3-fields'
do not mutate the passed params when making the request to google
Version bump to 0.4.0
Regenerate gemspec for version 0.4.0
more credits