Use dateTime for the created attribute

- Use data-type xsd:dateTime instead of xsd:date on
  the created attribute in content.xsd
Add CSS to the website and clean-up index.jsp

- Apply classes and ids to necessary elements in index.jsp
- Add css/index.css to the website module
- Add link to css/index.css in index.jsp
- Format index.jsp
Fixup index.js

- Properly initialize the index variable
- Add a missing semicolon
- Remove unused NewContentController