Get rid of a couple of copies of the CC0 text. Add header comment to
CC0 files to remind people editing them what the terms are. Also add
some missing XML headers. The header comments in layouts won't bloat
the binary - they get stripped out before compressing, same as any other
comments.
slot options. you now mount these with the -cart media switch,
i.e. for instance
mess.exe saturn -cdrm ddsom -cart ram32
or
mess.exe saturn -cdrm draculax -cart bram16
and not anymore using the -exp option. [Fabio Priuli]
out of whatsnew: this prevents users from passing conflicting setups like
"-exp ram32 -cart kof95", etc. these would have lead to unpredictable effects,
depending on the order of the option (and whether they were set at command
line or inside ini files)
