Stylesheet enhancements

Nested bullet points

Signed-off-by: Luke Oatham <lukeoatham@gmail.com>
Minor updates and bug fixes

Changes to correct a bug in news expiry dates. Introduction of resourcing cycle flag for vacancies. Improvements to download icons on text links that wrap over a line in IE.

Signed-off-by: Luke Oatham <lukeoatham@gmail.com>