Use the linked_records to properly deal with joliet entries.
Use the linked_records to properly deal with joliet entries.

This way, the user doesn't need to provide a valid
joliet_path for rm_file (which they may very well not
know).

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@gmail.com>

clalancette/pycdlib,clalancette/pyiso