adsense 5.x-2.1

Changes since DRUPAL-5--2-0:

• #222551 by mustafau, do not try to execute a function that may not exist.
• #195036 by kevinwelker, slight modifications by kbahey: Implement new Adsense code from Google.
• Cosmetic formatting. I like stuff to align ...
• #195036 (35) by jcventura, adding 200x90 format.
• #241121 by steamedpenguin, coding standards cleanup via coder module.
• #256547 by sinasalek modified by kbahey, ability to add descriptive titles to ad groups.
• Fix for revenue sharing: only one publisher ID to be displayed for all ads on the page. Previously, each ad could potentially get a different id, which is not in accordance with Google's policy, and is a bug.