Merge branch 'master' into devel

New release - version 9.1.0

Windows improvements and update extlinux.cfg

1. Hide command wind when multibootusb is launched
2. Update extlinux.cfg to match with updated syslinux.cfg

Merge branch 'devel'

Fix git commit error for release.

Merge branch 'master' of https://github.com/mbusb/multibootusb

Prepare for version 8.7.0 and other improvements

1. Version upgraded to 8.7.0
2. Updated changelog for version 8.7.0
3. Auto convert multibootusb file ending to Linux using dos2unix during packaging
4. Re-enable log message
5. Avoid crashing due to existence of syslinux.cfg

Fix for QEMU under windows post install

Update to new release - 8.5.0

update to version 8.4.0