add 4.0 content (sourced from https://mail-archive.com/qubes-users@googlegroups.com/msg14871.html)
add version headings
adjust R3.2 procedure for consistency with rest of document
remove "#" from R3.2 procedure because it works as regular user if permissions are set correctly
remove "known issues" heading so bullet points fall under R3.2 section instead of appearing to apply to both versions
