fixed single-internal-link
fixed grunt file and build files
added changelog
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into bugfix/single-internal-lin

Conflicts:
	CHANGELOG.md
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into bugfix/single-internal-lin

Conflicts:
	CHANGELOG.md
fixed tab
fixed changelog
fixed validation get sequenze bug
Merge branch 'develop' of git://github.com/sulu-cmf/sulu into bugfix/single-internal-lin
fixed changelog
fixed changelog
Merge branch 'bugfix/single-internal-lin' into develop