BUR #22 has been approved by @Goujer.
create implication mac_os_x_10.0 -> macos
remove implication classic_mac_os -> apple_inc.
remove implication macos -> apple_inc.
create implication windows_2000 -> windows
create implication windows_98 -> windows
create implication windows_nt -> windows
create implication windows_server -> windows
create implication windows_server_2003 -> windows_server
Make the macs more hierarchical, add hierarchy to more windows.