Add path_breadcrumbs patch for improved validation.

## 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 [Path Breadcrumbs](http://drupal.org/project/path_breadcrumbs) module to changes some of the validation checks in code and in form validation handler. It removes the right_value validation check in the path_breadcrumbs_ui module and adds some boolean checks to remove PHP errors.

## Deployment Instructions

* Merge code.