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.
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bbc_flop_6502: P-System
camplynx_cass: Super Air Raid
New NOT_WORKING software list additions
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bbcm_cart: Smart Cartridge [Centre for Computing History, ABUG]
* Fix Acorn SL names so they show in the right position in front-ends.
* Fix mistake in BBC Bridge Companion. Thanks to Pernod70.
* Fixed more names. Thanks to Pernod70.
* Some more name fixes.
* Fix names for hardware manufactured by Casper and Torch.
* SL title disc lowercase for coherence.
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bbc_flop_6502: all items now supported
bbc_flop_65c102: all items now supported
bbc_flop_68000: all items now supported
bbc_flop_80186: all items now supported and added Master 512 Technical Guide Programs
bbc_flop_z80: all items now supported and added Double Density CP/M