Reformat team JSON using Python for stable diffs.

Generated using json.dump(indent=4, sort_keys=True, separators=(',', ': ')).
Update team json script for stable full JSON file updates.
May team page data update.
Move advertising page from core to about plugin.
Styleguide: Convert tabs to spaces.
Styleguide: Use // for comments.
Remove unused styles from advertising.less.
Fix nits.
Add newlines.