Patching panels to kill warning on PHP 5.4.

Patch: https://drupal.org/files/panels-array_diff-1762290-3.patch
Issue: https://drupal.org/node/1762290

PHP 5.4 has gotten a lot more picky about what you throw at
array_diff_assoc() as it really doesn't support comparing objects.

Core patch is attempted at https://drupal.org/node/1850798 but that
requires contrib modules to be fixed too.
Removing spurious .orig file.
Added oembed module, and some CSS for it.
Much style fixing in CSS files.
Merge pull request #49 from reload/feature/oembed-124

Feature/oembed 124