Remove the "attrib" read-only flag from Broken Rainbows example in the Windows file system so that it does not later get included inside the zip file as "R" attribute, which causes installation problems on some platforms.
Note that to remove this attribute you can not use the properties dialog, you must manually use the the "attrib -r" command.
Hopefully (finally!) closes #110 and #112. Note that there is no commit for this update because git does not track these attribs!