Enhancement breadcrumbs for Custom post Types

**For consideration:**

Breadcrumbs for Custom Post Types now take the CPT->label instead of CPT->labels->menu_name as text parameter, as suggested by [katart17](http://wordpress.org/support/profile/katart17) and [Robbert V](http://wordpress.org/support/profile/robbert-v)

As suggested in: http://wordpress.org/support/topic/change-custom-post-type-label-for-breadcrumbs