dCoreusbinstall not deleting dCoreusbinstall dir under the tcedir

[jls]

Hello
as in the subject

[Jason W]

Hi.  The downloaded vmlinuz-bionic, vmlinuz-bionic.md5.txt, dCore-bionic.gz, dCore-bionic.gz.md5.txt files (if dCore-bionic is being used) are kept in that directory in the case dCore-usbinstall is run again as to not have to redownload those files next dCore-usbinstall session.  Especially if the TCE directory is persistent.  The md5sum is checked on those files on the next run of dCore-usbinstall, and new files are downloaded only if the md5sums don't match.  Saves time and bandwidth.  It is by design. 

Thanks.