Only delete known_hosts if .keep_known_hosts does not exist
Fix filename for WIN8_X64_ENTERPRISE
Update ISO path variables in README
Properly catch script failures in floppy/00-run-all-scripts.cmd (as tee always returns 0)
Try cygwin install up to 3 times, as it fails often
Update version numbers in script/cmtool.bat
Update version numbers in script/ultradefrag.bat
Don't delete box if PACKER_KEEP_BOX is defined in bin/ssh-box.sh
Added new scripts
Added new scripts: tweak-json.py and tweak-jsons.sh