BDD: add ContentTypeGroup's given steps implementation
BDD: update sentences to use real identifiers
BDD: add __destruct() method to given contexts
BDD: fix minor CS issue
BDD: remove A-Z steps definitions
BDD: fix minor mistake
Merge pull request #135 from MLoureiro/bdd_given_steps_first_stage

Bdd given steps first stage
BDD: enable REST BDD testing
Merge pull request #141 from MLoureiro/bdd_imp_sitemap

BDD: fix minor mistake in BrowserContext::checkLinkOrder()
Merge pull request #137 from MLoureiro/bdd_test_rest

BDD: enable REST BDD testing
BDD: rename feature name
BDD: add feature file for read/load ContentTypeGroups