Create works delete button and modify controller.

Created the delete works button on the catalog#index
and the generic_works#show page.  Modified the
generic_works controller destroy method to properly
delete the object.

HYDRASIR-123 #close
HYDRASIR-124 #close
Merge pull request #410 from projecthydra/feature/HYDRASIR-86-delete-works

Create works delete button and modify controller.