change to Symfony >=2.3.0,<2.4.0
Merge branch 'master' into symfony-2.3

* master:
  use self.version for Kunstmaan Bundles
  Symfony 2.2 and Kunstmaan bundles 2.2.8.* dependency
  don't show social widgets when there is no URL or linkedin product id.
  include facebook JS for like widget
  fix php 5.3
  tagging
  fix medialink
  fix mediaurl opengraph image
  composer fix
  Update composer.json

Conflicts:
	composer.json
updated doc
merge fix
Merge pull request #12 from Kunstmaan/symfony-2.3

Symfony 2.3