bthap 7.x-1.0-alpha2

Don't forget to flush your caches.

Changes since 7.x-1.0-alpha1:

• Added super-slim page.tpl.php;
• Added site_template variant; First-pass at the "Pass-through" anti-layout used by the site template;
• Removing page default - The theme should not assume this is relevant to your project.
• Updated h5bp css to html5-biolerplate at revision 551dd5c.
• Added documentation to elements in hook_html_head_alter().
• Changed Passthrough layout category.
• Improved documentation for Passthrough; Removed wrapper div in passthrough.
• Added icon for Passthrough.