Add panels_accordion patch to improve accordion administration.

## Ready State: Yes

This pull request is related to the following JIRA tickets: [ICS-94](https://imagex.atlassian.net/browse/ICS-94).

This patch alters the [Panels Accordion](http://drupal.org/project/panels_accordion) module to improve the content editor administration of panels accordions so that an entire region can easily be rendered as an accordion.

## Deployment Instructions

* Merge code.