[Config] Refactors a few part of the bundle. Now TestBundle FeatureContext is the default context class. Updated documentation.
[Doc] Updates the documentation explaining how to create app_test.php and more info on the bundle configuration
[Doc] Improve formatting of doc files
[Doc] Improves code formatting
[Doc] Fixes some entry in the documentation
[Context] FeatureContext now implements KernelAwareInterface
[Context] Removes the implementation of the kernelAwareInterface as it's not usable
Merge pull request #10 from kimu/symfony2-extension-adaptation

[Config] Changes to integrate symfony2 extension