Cleanup the pycdlib-genisoimage man page.
Cleanup the pycdlib-genisoimage man page.

And add in a bunch of new options that we now parse.

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

clalancette/pyiso,clalancette/pycdlib