Sandbox phpunit tests
Complete project tests
Fix codes
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Add license badge
Rework data fixtures
Move data fixtures into simple Yaml files
Add tests for Resources endpoint
Uncomment parent::tearDown() in custom WebTestCase

When calling `static::ensureKernelShutdown();` on test tearDown,
the test suite stop at the 10th tests.

See Symfony\Bundle\FrameworkBundle\Test\KernelTestCase::tearDown()
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Add tests for languages endpoint
Add a stage1 configuration file

This configuration enable to use [stage1.io](http://stage1.io/) service.

Documentation about this configuration file:
http://help.stage1.io/article/customizing-a-build-with-the-build-yml-file/

Note that it could be use outside the sources of the project
(http://help.stage1.io/article/using-a-build-yml-without-adding-it-to-my-sources/).
However I prefer integrate it to verion control to dispatch any changes
with an update of the project installation.

This file is a copy of the original config suggestion of @ubermuda
(https://gist.github.com/ubermuda/bbac8b7f392508feb087) for openl10n
(https://twitter.com/ubermuda/status/481774170926510080).
Add tests for Translations endpoint
Inline every badge below the main title
Add link to license file
Update the installation section in readme
Add a better description in the readme
Fix typo