[buildiso] Add option for outputing the image to a specific filename/directory
Created by: Sleaker
Enhancement request: Add -o (output) option to allow the user to give a specific filename & directory they would like the iso file to be written to.
Additional request: Don't overwrite the file by default, but instead warn with a y/n to overwrite before building and allow automatic overwrite through -f (force) or --force-overwrite.