fixed strucutre resolver
fixed test cases
Merge branch 'master' of git://github.com/sulu-cmf/SuluWebsiteBundle into hotfix/extension-data

Conflicts:
	Tests/Unit/Sulu/Bundle/WebsiteBundle/Navigation/ExcerptStructureExtension.php
Merge pull request #75 from sulu-cmf/hotfix/extension-data

[HOTFIX] Fixed strucuture resolver to use get content data for extensions