Added preliminary version of Vulnerability Description to show vulnerability template, including dedicated repository.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/Pwc/SirBundle/Controller/VulnerabilityController.php
	src/Pwc/SirBundle/Entity/Language.php
	src/Pwc/SirBundle/Repository/VulnDescriptionRepository.php
	src/Pwc/SirBundle/Repository/VulnerabilityRepository.php
	src/Pwc/SirBundle/Resources/views/Vulnerability/show.html.twig