Update CONTRIBUTING.md
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Update ruby 2.1 to latest patch
Merge pull request #100 from padi/update_travis

Update travis
Update CONTRIBUTING.md

Since when I checkout `develop` branch and run `git flow feature start yourfeature`, I get this error:

```sh
fatal: Not a gitflow-enabled repo yet. Please run "git flow init" first.
```

`git flow init` with the default values should be done first.
Merge pull request #101 from padi/patch-1

Update CONTRIBUTING.md
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Merge pull request #102 from rrrene/patch-2

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Update specs in preparation to rspec 3.0.0
Upgrade to rspec 3.0! The latest and greatest! \o/
- http://myronmars.to/n/dev-blog/2014/05/rspec-2-99-and-3-0-rc-1-have-been-released
Merge branch 'feature/upgrade_rspec' into develop

* feature/upgrade_rspec:
  Upgrade to rspec 3.0! The latest and greatest! \o/ - http://myronmars.to/n/dev-blog/2014/05/rspec-2-99-and-3-0-rc-1-have-been-released
  Update specs in preparation to rspec 3.0.0