Label styling

Corrected min-width on labels to fit "Allow Comments" label.
Admin interface styling. Install styling and markup changes. Category helper text change. Rouge white space removal in GB language file.
Ignore content folder contents.
Failed to fix the custom fields on pages, however was able to add full screen mode to pages. Also fixed the js for the filename appearing in fields. And uncommented dragdrop.js, causing no harm so might as well.
Merge pull request #167 from daviddarnes/0.9

Tiny style change.