added internal links content type
init js
Merge branch 'feature/additional-tabs' of git://github.com/sulu-cmf/SuluContentBundle into feature/internal_links

Conflicts:
	Resources/config/content_types.xml
	Resources/public/dist/components/content/components/preview/main.js
implemented javascript component
implemented api, fixed css
fixed empty request bug
Merge branch 'develop' into feature/internal_links
fixed item change bug
fixed item change bug
cleaned code
Merge branch 'feature/internal_links' into develop